L I P

Laboratório de Instrumentação e Física Experimental de Partículas

L I P

L I P [PARTICLES AND TECHNOLOGY]

fechar X

Rui Santos

Colaborador ( LIP Minho ) / Professor (FCUL)

 

Bio

Degrees
 
PhD, 1998, University of Lisbon.
Supervisor: Augusto Barroso.
Title: Renormalization of a 2-Higgs Doublet Model.
 
Master, 1994, University of Lisbon.
Supervisor: Augusto Barroso.
Title: Carged Higgs production in e+ e- colliders in a 2-Higgs Doublet Model.
 
 
Actividades anteriores e situação actual
Período
Cargo, categoria ou actividade
Instituição
01-6-2015 a Invited Professor University of Lisbon
01-6-2011 a 01-6-2014 Invited Professor University of Coimbra
01-9-2010 a 01-9-2011 Invited Reseracher University of Southampton
01-9-2010 a Professor Adjunto Instituto Superior de Engenharia de Lisboa
01-8-2008 a 31-7-2010 Researcher (Marie-Curie IEF) University of Southampton
31-8-2006 a 31-7-2008 Investigador (Bolseiro FCT) Royal Holloway University of London
a Professor Auxiliar Instituto Superior de Transportes e Comunicações
a Assistente Instituto Superior de Transportes
a Assistente Convidado Instituto Superior de Transportes
Scientific Activity
Particle Physics. Higgs Physics. Extensions of the scalar sector of the Standard Model. Development of tools for High Energy Physics. Top quark Physics and anomalous couplings.

--- Convener of the sub-group CERN's BSM "Neutral Extended Scalars" do CERN since February 2015
twiki.cern.ch/twiki/bin/view/LHCPhysics/LHCHXSWG.

---- Author of the section "Extended Scalar Sectors" in the Yellow Report 4 (2017) that set the stage for the seraches for the LHC Run 2.

_________________Research Grants_________________________

Mar 2011 - Feb 2014 Marie-Curie Reintegration Grant (FP7).
Aug 2008 - Jul 2010 Marie-Curie Intra European Fellowship (FP7).
Sep 2006 - Jul 2008 Postdoc grant: Portuguese Foundation for Science and Technology (FCT).
Sep 2006 - Feb 2007 Visiting Research grant from the Science and Technology Facilities Council, UK.
Dec 1992 - Nov 1996 PhD grant from FCT.
Jan 1991 - Nov 1992 Masters grant from FCT.
_______________________________________________________

___________________Organisation of Conferences______________

[1] Sep 2017 Member of the Organizing Committee of TOP 2017 - International Workshop on Top Quark Physics, Universidade do Minho, Braga, Portugal.

[2] Oct 2016 Member of the International Advisory Committee of the Sixth InternationalWorkshop on Prospects for Charged Higgs Discovery at Colliders, to be held in Uppsala, Sweden 3-6 October 2016.

[3] Sep 2016 Member of the Organizing Committee of the Workshop on Multi-Higgs Models, Lisbon, Portugal.

[4] Sep 2014 Member of the Organizing Committee of the Workshop on Multi-Higgs Models, Lisbon, Portugal.

[5] Sep 2014 Member of the International Advisory Committee of the Fifth InternationalWorkshop on Prospects for Charged Higgs Discovery at Colliders, to be held in Uppsala, Sweden 16-18 September 2014.

[6] Aug 2012 Member of the Organizing Committee of the Workshop on Multi-Higgs Models, Lisbon, Portugal.

[7] May 2012 Member of the Scienti c Committee of OCHEP2012 - International Conference on High Energy Physics, Marrakesh, Morocco.

[8] Sep 2012 Member of the Organizing Committee of the Idpasc Higgs School, Foz do Arelho, Portugal.

[9] May 2008 Member of the International Advisory Committee of TOP 2008 - InternationalWorkshop on Top Quark Physics, La Biodola, Isola d'Elba, Italy.

[10] Jan 2006 Member of the Organizing Committee of TOP 2006 - International Workshop on Top Quark Physics, Universidade de Coimbra, Coimbra, Portugal.
Scientific Domain
Particle physics with a special focus on Higgs and top quark physics.

Higgs - Phenomenology of multi-Higgs scalars for the LHC and future colliders. Renormalization of the two-Higgs doublet model (2HDM). Renormalization of other extensions of the SM. Vacuum stability in multi- Higgs extensions of the Standard Model. Detailed study of the structure of SM extensions starting with the simplest extensions: the real and the complex singlet models and the 2HDM. Development of the ScannerS tool for multi-Higgs models. Extensions of other tools.

top quark - Development of the MEtop generator now an official generator for the ATLAS collaboration at the Large Hadron Collider. Dimension six effective operators with processes involving the top quark. Limits on the anomalous couplings in top processes at the LHC and at a future International Linear Collider.
Actuais interesses de investigação
a) Phenomenology of multi-Higgs extensions and comparison of the models at the LHC and future colliders such as the ILC or CLIC.

b) Vacuum stability in more complex extensions of the SM.

c) Vacuum stability at higher order with the use of the effective potential.

d) Symmetries in multi-Higgs extension like 3-Higgs double models. 

e) Radiative corrections in multi-Higgs extensions to face the needs of the LHC collaborations, ATLAS and CMS. 

f) Development of high-energy physics tools to calculate higher order production processes and decays at the LHC in multi-Higgs models. Inclusion of new processes in the MEtop generator. Development of the ScannerS tool in order to study the parameter space of multi-Higgs models.
http://scanners.hepforge.org/.
Outras competências/actividades
Many years of experience in Mathematica and Maple. Lots of experience with high-energy physics tools like LanHEP, CalcHEP, FeyRules, Madgrapg/Madevent, FeyArts, FormCalc, FeynCalc and LoopTools.
Use of Pythia and Delphes.
Supervision
Postdoctoral

[1] António Morais (co-supervision with Carlos Herdeiro and Roman Pasechnik), on-going.

PhD students

[2] Marcel Krause (co-supervised with M. Muhlleitner), Renormalization of extensions of the
Standard Model, Karlsruher Institut fur Technologie, (2019).

[3] Renato Batista Guedes Júnior (co-supervised with A. Barroso). Title: Flavour Changing at Colliders in the Effective Theory Approach, Universidade de Lisboa, 2008.

[4] Sancho Moura Oliveira (co-supervised with A. Barroso and B. Ermolaev). Title: Electroweak Loop Corrections to High Energy Processes, Universidade de Lisboa, 2008. 

[5] Miguel Won, Title: Flavour-Changing-Neutral-Currents in top quark physics, Universidade de Coimbra, 2014.

Master students

[6] Marcel Krause (co-supervised with M. Muhlleitner), On the Renormalization of the Two-
Higgs-Doublet Model, KIT, Karlsruhe, 2016.

[7] Miguel Won (co-supervised with A. Onofre), Title: Combined effects of strong and electroweak effective FCNC operators in top production at the LHC, Universidade de Coimbra, 2008.

Project Grants (Bolseiros BIC)

[8] Raul Costa, BIC from the Project; Particle Physics at the LHC and at future colliders, PTDC/FIS/117951/2010, 2014.

[9] Eduardo Dias, BIC from the Project; Particle Physics at the LHC and at future colliders, PTDC/FIS/117951/2010,, PTDC/FIS/117951/2010, 2014.

[10] Rodrigo Antunes, BIC from the Project; Particle Physics at the LHC and at future colliders, PTDC/FIS/117951/2010,, PTDC/FIS/117951/2010, 2013.
Projectss
As PI

ONGOING

[1] FCT/CNRST Bilateral with Morocco (Prof. Abdesslam Arhrib, Tangier University) - "Non minimal Higgs models
at the LHC", 11 participants (4 students), 1500 euros/year (Portuguese side), (2017 and 2018).

CONCLUDED

[2] FCT/DAAD Bilateral with Germany (Prof. Margarete Muhlleitner, Karlsruher Institut fur Technologie KIT) - "Exploring
Beyond the Standard Model Higgs Sectors", 8 participants (4 students), 2000 euros/years (Portuguese side) (2015 and 2016).

[3] FCT/CNRST Bilateral with Morocco(Prof. Abdesslam Arhrib, Tangier University) - "Profiling the Higgs boson recently discovered at CERNs Large Hadron Collider", 8 participants (4 students), 2000 euros/year (Portuguese side), (2013 and 2014).

[4] GRICES/CNRST Bilateral with Morocco (Prof. Abdesslam Arhrib, NCTS, Hsinchu and Tangier University) - "Higgs
Searches and bounds on the Higgs masses. Properties of the top quark", 8 participants (4 students), financing for 4 weeks
travelling (2006 e 2007).

[5] FCT, POCTI/FIS/59741/2004 - "Particle Physics at the LHC and LC", 13 participants, 45000 euros for 3 years.

[6] CERN/FCT, POCTI/FP/FNU/50155/2003 - "Particle Physics", 11 participants, 12000 euros for 1 year.

[7] INIDA-ICCTI 03232/DAAD Bilateral with Germany (Prof. Karl Schilcher, Univ. of Mainz) - "Renormalization and
loop effects in the Standard Model and two-Higgs doublet models", financing for 4 weeks travelling (1999 and 2000)


As Principal Investigator for Portugal

ONGOING

[8] H2020-MSCA-RISE-2014, ProjectID: 645722 - Non Minimal Higgs", PI - Prof. Stefano Moretti (university of Southampton) and 9 other partners: ISE (Lisbon), U. Santa Cruz, U. Toyama, U. Carleton, U. Paris-Sud, U. Helsinki, U. Abdelmalek
Essaadi, U. Uppsala and U. of Science and Technology at Zewail City, 328 500 euros for four years.
http://cordis.europa.eu/project/rcn/194372 en.html.

[9] Harmonia (UMO-2015/18/M/ST2/00518), National Science Center, Poland - "Investigation of extensions of the Standard Model including the effects of new physics up to the Planck scale and the current the LHC and astrophysical data", PI Prof. Maria Krawczyk (U Warsaw). Participants: U. Lisbon, U. Dresden and U. Catania (2016 to 2019).

As collaborator

[10] EXPL/FIS-NUC/1705/2013 - Higgs boson studies in ttH associated production at the LHC", PI - Dr. Ricardo Goncalo (LIP).

[11] FCT,PTDC/FIS/117951/2010 - "Particle Physics at the LHC - Large Hadron Collider - and in future colliders", PI Prof. Pedro Ferreira.

[12] FCT, CERN/FP/83588/2008 - "Physics at the LHC", PI Prof. A. Onofre.

[13] FCT, POCI/FP/81950/2007 - "Physics at the LHC", PI Prof. A. Onofre.

[14] FCT, PTDC/FIS/70156/2006 - "Particle Physics at the LHC and ILC", PI Prof. Pedro Ferreira.

[15] British Council PMI2 Connect - Research Co-operation Award - "Charged Higgs Bosons asSignals of New Physics", PIs Prof. Stefano Moretti and Prof. Shinya Kanemura.

[16] "SFTC Research Visiting Grant", for Prof. Abdesslam Arhrib to visit the University of Southampton.

[17] POCTI/FNU/49523/2002 PI: Prof. Augusto Barroso, "Particle Physics".

[18] CERN/FIS/43652/01, CERN/P/FIS/40131/00, CERN/P/FIS/15183/99, CERN/P/{FIS/1096/96, CERN/S/FAE/1050/95, PI of all Prof. Augusto Barroso, "Fsica de Partculas, Relatividade e Cosmologia".

[19] CERN/S/FAE/1064/97 e CERN/P/FIS/1214/98 PI: Prof. Paulo Crawford do Nascimento, "Fsica de Partculas e Cosmologia".

[20] PLUS/LIN/50270/2003 "Recursos Lingusticos para o estudo das variedades africanas do português" PI Dr. Fernanda Bacelar.

[21] "Collaboration in the DELPHI Experiment" PI: Prof. Mario Pimenta entre 2002 e 2004.

[22] "Collaboration in the DELPHI Experiment" PI: Prof. Pedro Abreu de 2004 a 2005.
Publications
 
Thesis
[1] R. Santos, Estudo da produção de Higgs carregados em colisões electrão-positrão para um modelo com dois dubletos. Tese de Mestrado, Universidade de Lisboa, 1994.
 
[2] R. Santos, Renormalização de um modelo com dois dubletos de Higgs: alguns exemplos e aplicações. Tese de Doutoramento, Universidade de Lisboa, 1998.
 
Chapters in books
[1] L. Brücher and R. Santos, Searches for Higgs bosons in two-Higgs doublet models: the fermiophobic limit. Invited chapter to be published in "Search for the Higgs Boson, "Nova Science Publishers, Inc.Hauppauge, NY, 2006.
 
Refereed articles
[1] A.G. Akeroyd et al.: Prospects for charged Higgs searches at the LHC, Eur. Phys. J. C77 (2017) no.5, 276 
no.7, 075019.

[2] M. Krause, M. Muhlleitner, R. Santos, H. Ziesche: Higgs-to-Higgs boson decays in a 2HDM at next-to-leading order, Phys. Rev. D95 (2017) no.7, 075019.

[3] M. Muhlleitner, M.O.P. Sampaio, R. Santos, J. Wittbrodt: The N2HDM under Theoretical and Experimental Scrutiny, JHEP 1703 (2017) 094.

[4] M. Krause, R. Lorenz, M. Muhlleitner, R. Santos, H. Ziesche: Gauge-independent Renormalization of the 2-Higgs-Doublet Model, JHEP 1609 (2016) 143.

[5] S. Moretti, R. Santos, P. Sharma: Optimising Charged Higgs Boson Searches at the Large Hadron Collider Across bbW
Final States, Phys.Let. B760 (2016) 697.

[6] R. Costa, M. Muhlleitner, M.O.P. Sampaio, R. Santos: Singlet Extensions of the Standard Model at LHC Run 2: Benchmarks and Comparison with the NMSSM, JHEP 1606 (2016) 034.

[7] D. Fontes, J.C. Romão, R. Santos, J.P. Silva: Undoubtable signs of CP-violation in Higgs boson decays at the LHC run 2, Phys. Rev. D92 (2015) 5, 055014.

[8] S.P. Amor dos Santos, J.P. Araque, R. Cantrill, N.F. Castro, M.C.N. Fiolhais, R. Frederix, R.
Goncalo, R. Martins, R. Santos, J. Silva, A. Onofre, H. Peixoto, A. Reigoto, Angular distributions in ttH (H ->bb) reconstructed events at the LHC, Phys. Rev. D92 (2015) 3, 034021.

[9] R. Costa, A.P. Morais, M.O.P. Sampaio, R. Santos: Two-loop stability of a complex singlet extended Standard Model, Phys. Rev. D92 (2015) 2, 025024.

[10] D. Fontes, J.C. Romão, R. Santos, J.P. Silva: Large pseudoscalar Yukawa couplings in the complex 2HDM, JHEP 1506
(2015) 060.

[11] P.M. Ferreira, Renato Guedes, Marco O.P. Sampaio,Rui Santos: Wrong sign and symmetric limits and non-decoupling in 2HDMs, JHEP 1412 (2014) 067.

[12] P.M. Ferreira, John F. Gunion, Howard E. Haber, Rui Santos: Probing wrong-sign Yukawa couplings at the LHC and a future linear collider, Phys. Rev. D89 (2014) 115003. 

[13] A. Arhrib, P.M. Ferreira, Rui Santos: Are There Hidden Scalars in LHC Higgs Results? , JHEP 1403 (2014) 053.

[14] R. Guedes, R. Santos, M. Won: Limits on strong FCNC top couplings at the LHC, Phys. Rev. D88 (2013) 11, 114011.

[15] S.D. Rindani, P. Sharma, R. Santos: Measuring the charged Higgs mass and distinguishing between models with top-quark observables, JHEP 1311 (2013) 188.

[16] A. Barroso, P.M. Ferreira, I.P. Ivanov, Rui Santos: Metastability bounds on the two Higgs doublet model, JHEP 1306 (2013) 045.

[17] A. Barroso, P.M. Ferreira, I.P. Ivanov, Rui Santos, Joao P. Silva: Evading death by vacuum, Eur. Phys. J. C (2013) 73:2537.

[18] R. Coimbra, M. O.P. Sampaio and R. Santos, ScannerS: Constraining the phase diagram of a complex scalar singlet at the LHC, Eur. Phys. J. C (2013) 73:2428.

[19] P.M. Ferreira, H. E. Haber, R. Santos and J. P. Silva, Mass-degenerate Higgs bosons at 125 GeV in the Two-Higgs-Doublet Model, Phys. Rev. D.87 (2013) 055009.

[20] R. Coimbra, A. Onofre, R. Santos and M. Won, MEtop - a generator for single top production via FCNC interactions, Eur. Phys. J. C72 (2012) 2222.

[21] R. Guedes, S. Moretti, and R. Santos, Charged Higgs bosons in single top production at the LHC, JHEP 1210 (2012) 119.

[22] A. Barroso, P.M. Ferreira, R. Santos and J. P. Silva, Probing the scalar-pseudoscalar mixing in the 125 GeV Higgs particle with current data, Phys. Rev. D86 (2012) 015022.

[23] S. S. Biswal, S. Mitra, R. Santos, P. Sharma, R. K. Singh and M. Won, New physics contributions to the forward-backward asymmetry at the Tevatron, Phys.Rev. D86 (2012) 014016.

[24] P.M. Ferreira, R. Santos, M. Sher and J. P. Silva, Could the LHC two-photon signal correspond to the heavier scalar in two-Higgs-doublet models?, Phys. Rev. D85 (2012) 035020.

[25] A. Arhrib, C.-W. Chiang, D. K. Ghosh, R. Santos, Two Higgs Doublet Model in light of the Standard Model H->t+t- search at the LHC, Phys.Rev. D85 (2012) 115003.

[26] P.M. Ferreira, R. Santos, M. Sher, J. P. Silva, Implications of the LHC two-photon signal for two-Higgs-doublet models, Phys. Rev. D85 (2012) 077703.

[27] M. Aoki, R. Guedes, S. Kanemura, S. Moretti, R. Santos and K. Yagyu, Light Charged Higgs bosons at the LHC in 2HDMs, Phys. Rev. D84 (2011) 055028.

[28] A. Belyaev, R. Guedes , S. Moretti, R. Santos, Very Light Higgs Bosons in Extended Models at the LHC, Phys.Rev.D81:095006,2010.

[29] A. Belyaev, R. Guedes , S. Moretti, R. Santos, Higgs boson phenomenology in tau+ tau- final states at the LHC, JHEP 1007:051,2010.

[30] A. Arhrib, R. Benbrik, C.-H. Chen, R. Guedes, R. Santos, Double Neutral Higgs production in the Two-Higgs doublet model at the LHC. JHEP 0908:035, 2009. 

[31] A. Arhrib, R. Benbrik, C.-H. Chen, R. Santos, Neutral Higgs boson pair production in photon-photon annihilation in the Two Higgs Doublet Model. Phys. Rev. D80 (2009) 015010. 

[32] S. Kanemura, S. Moretti, Y. Mukai, R. Santos, K. Yagyu, Distinctive Higgs Signals of a Type II 2HDM at the LHC. Phys. Rev. D79 (2009) 055017.

[33] R.A. Coimbra, P.M. Ferreira, R.B. Guedes, O. Oliveira, A. Onofre, R. Santos, M. Won, Dimension six FCNC operators and top production at the LHC. Phys. Rev. D79 (2009) 014006.

[34] A. Arhrib, R. Benbrik, R. Guedes, R. Santos, Search for a light fermiophobic Higgs boson produced via gluon fusion at Hadron Colliders. Phys. Rev. D78 (2008) 75002.

[35] P.M. Ferreira, R.B. Guedes, R. Santos, Combined effects of strong and electroweak FCNC effective operators in top quark physics at the CERN LHC. Phys. Rev. D77 (2008) 114008. 

[36] F. del Aguila et al. - Report of Working Group 1 of the CERN Workshop Flavor in the Era of the LHC. 
Published in Collider aspects of flavour physics at high Q.. Eur. Phys. J. C57 (2008) 183-308. 

[37] A. Barroso, P.M. Ferreira and R. Santos, Neutral minima in two-Higgs doublet models. Phys. Lett. B652 (2007) 181-193.

[38] DELPHI Collaboration (J. Abdallah et al.), Search for a fourth generation b-prime-quark at LEP-II at s**(1/2) = 196-GeV - 209-GeV. Eur. Phys. J. C50 (2007) 507-518.

[39] P.M. Ferreira, R.B. Guedes and R. Santos, Lepton flavour violating processes at the International Linear Collider. Phys. Rev. D75 (2007) 055015.

[40] A. Barroso, P.M. Ferreira, R. Santos and João P. Silva, Stability of the normal vacuum in multi-Higgs-doublet models.Phys. Rev. D74 (2006) 085016.

[41] P.M. Ferreira and R. Santos, Contributions from dimension six strong flavor changing operators to t anti-t, t plus gauge boson, and t plus Higgs boson production at the LHC, Phys. Rev. D74 (2006) 014006. 

[42] P.M. Ferreira and R. Santos, Strong flavor changing effective operator contributions to single top quark production, Phys. Rev. D73 (2006) 054025. 

[43] P.M. Ferreira, O. Oliveira and R. Santos, Flavor changing strong interaction effects on top quark physics at the LHC, Phys.Rev.D73 (2006) 034011. 

[44] A. Barroso, P.M. Ferreira, R. Santos, Charge and CP symmetry breaking in two Higgs doublet models, Phys.Lett.B632 (2006) 684-687. 

[45] P.M. Ferreira, R. Santos, A. Barroso, Stability of the tree-level vacuum in two Higgs doublet models against charge or CP spontaneous violation, Phys. Lett. B603 (2004) 219-229; Erratum-ibid.B629:114,2005.

[46] S. M. Oliveira and R. Santos, Bounds on the mass of the b´ quark reexamined. Phys. Rev. D68 (2003) 093012.

[47] S. M. Oliveira, L. Brücher, R. Santos and A. Barroso, Electroweak corrections to the top quark decay. Phys. Rev. D 64 (2001) 017301.

[48] A. Barroso, L. Brücher and R. Santos, Renormalization of the Cabibbo-Kobayashi-Maskawa matrix. Phys. Rev. D 62 (2000) 066003.

[49] L. Brücher and R. Santos, Experimental signatures of light fermiophobic Higgs boson, Eur. Phys. J. C12 (2000) 87-98.

[50] A. Barroso, L. Brücher and R. Santos, Is there a light fermiophobic Higgs boson?, Phys. Rev. D 70 (1999) 035805.

[51] R. Santos A. Barroso and L. Brücher, Top quark loop corrections to the decay H+ -> h W+ , cn the Two Higgg Doublet Model, Phys. Lett. B 491 (1997) 429-433.

[52] R. Santos and A. Barroso, Renormalization of Two Higgs Doublet Models, Phys. Rev. D 56 (1997) 5366-5385.

[53] J. Velhinho, R. Santos and A. Barroso, Tree Level Vacuum Stability in Two Higgs Doublet Models}, Phs. Lett. B322 (1994) 213-218.
 
Proceedings
[1] A. Amorim, J.P. Araque, N.F. Castro, J. Santiago, R. Santos: Production of tgamma and tZ and tH via Flavour Changing Neutral Currents, PoS TOP2015 (2016) 067.

[2] Rui Santos, P.M. Ferreira, Renato Guedes, John F. Gunion, Howard E. Haber, Marco O.P. Sampaio: The CP-conserving 2HDM after the 8 TeV run, PoS DIS2014 (2014) 127.

[3] Rui Santos, P.M. Ferreira, Renato Guedes, John F. Gunion, Howard E. Haber, Marco O.P. Sampaio: The Wrong Sign limit in the 2HDM, EConf Conference: C14-06-02.2.

[4] A. Barroso, P.M. Ferreira, I. Ivanov, R. Santos, João P. Silva: Avoiding Death by Vacuum, J. Phys. Conf. Ser. 447 (2013) 012051.

[5] P.M. Ferreira, R. Santos, M. Sher, J.P. Silva: 2HDM confronting LHC data, Proceedings of 48th Rencontres de Moriond on QCD and High Energy Interactions : La Thuile, Italy, March 9-16, 2013.

[6] R. Coimbra, A. Onofre, R. Santos, M. Won, MEtop – a top FCNC event generator, J. Phys. Conf. Ser. 447 (2013) 012031.

[7] R. Guedes, S. Moretti, R. Santos, Charged Higgs boson production in single top mode at the LHC, J. Phys. Conf. Ser. 447 (2013) 012057.

[8] R. Guedes, S. Moretti, R. Santos, Charged Higgs discovery potential in the single top mode in 2HDMs, PoS CHARGED2012 (2012) 021.

[9] D.K. Ghosh, A. Nyffeler, V. Ravindran, N. Agarwal, P. Agarwal, P. Bandyopadhyay, R. Basu, B. Bhattacherjee, S.S. Biswal, D. Choudhury et al., Working group report: Physics at the Large Hadron Collider, Pramana 76 (2011) 707-723.

[10] R. Santos, Light Higgs pair production in the 2HDM: LHC vs. gamma gamma collider, Nuovo Cim. C033N2 (2010) 177-182.

[11] R. Guedes, S.Kanemura, S. Moretti, R. Santos and K. Yagyu, Charged Higgs Boson Benchmarks in the CP-conserving 2HDM, PoS CHARGED2010 (2010) 037.

[12] A. Arhrib, R. Benbrik, C.-H. Chen and R. Santos, Double Higgs production at a photon collider, DESY-PROC-2009-03 Photon 2009: International Conference on the St Conference: C09-05-11, p.64-70.

[13] R. Guedes, R. Santos, M. Won, top FCNC physics at a Linear Collider after the LHC. to appear in the proceedings of the International Linear Collider Workshop 2010 (LCWS10 & ILC10), Beijing, China.

[14] A. Belyaev, R. Guedes, S. Moretti, R. Santos, BSM Higgs searches in the gluon fusion process pp -> h +jet -> tau^+ tau^- + jet at the LHC, Published in PoS DIS2010:207,2010.

[15] R. Santos, "Higgs pair production in THDM - LHC vs. photon-photon Collider", "LC09 - e+e- Physics at the TeV Scale and the Dark Matter Connection" Nuovo Cimento C 33 (2010) 177.

[16] A. Arhrib, R. Benbrik, C.-H. Chen, R. Santos, Double Higgs production at a photon collider., DESY-PROC-2009-03, Jan 2010. 7pp., Prepared for Photon 2009: International Conference on the Structure and Interactions of the Photon: 18th International Workshop on Photon-Photon Collisions: International Workshop on High Energy Photon Linear Colliders, Hamburg, German .Published in *Hamburg 2009, Photon 2009* 64-70.

[17] N. Barros e Sa, A. Barroso, P. Ferreira, R. Santos, Vacuum Stability in two-Higgs doublet models, PoS CHARGED2008:014,2008.

[18] P.M. Ferreira, R.B. Guedes, R. Santos, Lepton flavour violation at the ILC, Acta Phys.Polon.Supp.1:433-436,2008.

[19] P.M. Ferreira and R. Santos, Contributions from flavour changing effective operators to the physics of the top quark at LHC, PoS TOP2006 (2006) 004; proceedings of TOP 2006 International Workshop on Top Quark Physics January 12-15, 2006 University of Coimbra, Portugal.

[20] A. Barroso, P.M. Ferreira and R. Santos, Tree-Level Vacuum Stability in Multi Higgs Models, PoS(HEP2005)337, HEP2005, International Europhysics Conference on High Energy Physics, July 21st - 27th 2005, Lisboa, Portugal.

[21] A. Barroso, P.M. Ferreira and R. Santos, Some remarks on tree-level vacuum stability in two Higgs doublet models, Proceedings of International Conference on High Energy and Mathematical Physics, Marrakech, Morocco, 4-7 Apr 2005. 
e-Print Archive: hep-ph/0507329.

[22] S. M. Oliveira and R. Santos, New bounds on the mass of a b´ quark, Acta Physica Polonica B34 (2003) 5523.

[23] S.Andringa, et al. Search for a fourth generation b´- quark at LEP-II at center of mass energies of 200-209 GeV. Contributed paper to EPS 2003 (Aachen) and LP 2003 (FNAL).

[24] A. Barroso, L. Brücher, S. M. Oliveira and R. Santos, One
loop electroweak corrections to the decay t -> b W. FÍSICA 2000 - 12ª Conferência Nacional de Física, Figueira da Foz, Portugal, 27 a 30 de Setembro de 2000.

[25] L. Brücher and R. Santos, Experimental Signatures of a Fermiophobic Higgs Boson. Publicado em PARTICLE PHYSICS AT THE START OF THE NEW MILLENNIUM. Edited by Alexander I. Studenikin. Singapore, World Scientific, 2001.

[26] R. Santos, A. Barroso and L. Brücher, Top loop corrections to axion decays in two-Higgs-doublet models. FÍSICA 98 - 11ª Conferência Nacional de Física, Forum da Maia.
 
Other publications
Computer programs for high-energy physics

MEtop - A generator for single top production via FCNC interactions
(http://coimbra.lip.pt/miguelwon/MEtop/).

ScannerS - A C++ tool for scanning the parameter space of arbitrary scalar extensions of the
Standard Model (https://scanners.hepforge.org/).

sHDECAY - A fortran code to calculate the decays of an extension of the SM with one extra scalar
singlet eld (https://www.itp.kit.edu/maggie/sHDECAY/).

N2HDECAY - A fortran code to calculate the decays of an extension of the SM with one extra scalar
doublet and one extra scalar singlet (https://www.itp.kit.edu/maggie/N2HDECAY/).
Talks
 
Invited
[1] "Comparing extended scalar sectors at the LHC", HPNP2017: Higgs as a probe of new physics 2017, University of Toyama, Japan, March 2017. 
http://www3.u-toyama.ac.jp/theory/HPNP2017/.

[2] "BSM Higgs sectors - non-SUSY (T)", WE Heraeus Seminar - The High-Energy LHC - Interplay between Precision measurements and Searches for New Physics, Physikzentrum Bad Honnef, Germany, October 2016.
https://indico.cern.ch/event/508176/images/8390-Heraeus-Poster-2016.png.

[3] "Higgs Physics at Hadron Colliders I and II", 1st IBS-Honam Focus Program on Particle Physics Phenomenology, Chonbuk National University (CBNU), Jeonju, South Korea, August 2016.
https://indico.ibs.re.kr/event/73/.

[4] "2HDMs as benchmark models at run 2", Scalars 2015, Warsaw, Poland, December 2015.
http://scalars2015.fuw.edu.pl/tentative-list-of-plenary-speakers.html.

[5] "2HDMs", CMS HiggsExotics Workshop, CERN, Switzerland, December 2015.

[6] "2HDMs as benchmark models at the LHC", 100 years of Strong Gravity, 5 years of Gr@v, Aveiro, Portugal, November 2015.
http://gravitation.web.ua.pt/index.php?q=node/464.

[7] "A complex, and yet so simple, 2HDM", The High Energy Physics KIT 2015,
Karlsruhe, Germany, October 2015.
https://indico.cern.ch/event/369827/timetable/#20151007.detailed.

[8] Fevereiro 2015 - "A CP-violating 2HDM at the LHC", HPNP2015: Higgs as a probe of new physics 2015, University of Toyama, Japan, February 2015.
http://jodo.sci.u-toyama.ac.jp/theory/HPNP2015/HPNP2015 poster.pdf.

[9] "Interpretation of the LHC run-1 Higgs results (2HDM)", CHARGED 2014: Prospects
for Charged Higgs Discovery at Colliders, Uppsala, Sweden, September 2014.

[10] "The wrong sign scenario some other interesting features of 2HDMs", The Higgs Days 2014, Santander, Spain, September 2014.

[11] "2HDM after the 8 TeV run and the wrong-sign Yukawa coupling", DIS2014, Warsaw, Poland, August 2014.

[12] "Are there hidden scalars in LHC results", The 2nd Winter Workshop on Particle Physics and Cosmology "Basis of the Universe with Revolutionary Ideas 2014 (BURI 2014), University of Toyama, Japan, February 2014.

[13] "2HDM and the new LHC data", Rencontres de Moriond - QCD and High Energy Interactions, La Thuille, Italy, March 2013.

[14] "2HDM at the LHC - the story so far", HPNP2013, Fevereiro 2013, University of Toyama, Japan, February 2013.
 
Other talks
[1] "Comparing extended scalar sectors at the LHC", PLANCK2017, Warsaw, Poland, May 2017.

[2] "Gauge independent renormalization of the 2HDM", 3rd RISE Collaboration Meeting:
NonMinimalHiggs, University of Toyama, Japan, March 2017.

[3] "Harmonia and BSM physics", 1st Harmonia meeting, Warsaw, Poland, December 2016.

[4] Janeiro 2016 - "Benchmark scenarios for singlet, doublet and triplet extensions of the SM",
LHCHXSWG 11th General Assembly Meeting, CERN, Switzerland, January 2016.

[5] "Benchmark scenarios for 2HDMs and for singlet models", The Higgs Days 2015, Santander, Spain, September 2015.

[6] "Benchmark scenarios for the 2HDM and for the Triplet model", LHCHXSWG 10th General Assembly Meeting, CERN, Switzerland, July 2016.

[7] Marco 2015 - "Flavour Changing Neutral Currents in the top quark sector", Workshop on New Physics Searches in the Top Quark Sector at the LHC, Braga, Portugal, March 2015.

[8] "2HDM after the 8 TeV run and probing the wrong-sign Yukawa coupling", Large Hadron Collider Physics (LHCP) Conference, Junho 2014, New York, USA.

[9] "Are there hidden scalars in LHC results", 11th LHC Physics Meeting, KIAS Korea Institute for Advanced Science, Seoul, South Korea, February 2014.

[10] "Hidden scalars and chain decays in 2HDMs", CERN, Switzerland, December 2013.

[11] "Are there hidden scalars in LHC results", Worshop on High Energy Physics, Morocco, November 2013.

[12] "Probing charged Higgs Yukawa couplings with top-­-quark observables", Scalars 2013, Poland, September 2013.

[13] "2HDMs after the 8 TeV run", Beyond the LHC, Nordita, Sweden, July 2013.

[14] "Discovery potential of a light H+ at the LHC in the single top mode", CHARGED 2012: Prospects for Charged Higgs Discovery at Colliders, Uppsala, Sweden, October 2012.

[15] "2HDM in light of the recent LHC results", The 2nd KIAS Phenomenology workshop, KIAS, Deoul, South Korea 2012.

[16] "Light Charged Higgs in 2HDM", Toyama in Winter - Phenomenology and Cosmology Workshop, Toyama, Japan, February 2012.

[17] "The 2HDM in light of the recent LHC results", POwLHC Workshop, KEK, Tsukuba, Japan, February 2012.

[18] "Light Charged Higgs in CP-conserving 2HDM at the LHC, Scalars 2011,Warsaw, Poland, August 2012.

[19] "Charged Higgs in CP-conserving 2HDM", cHarged 2010, Uppsala, Sweden, September 2010.

[20] "Very light Higgs at the (14 TeV) LHC", NExT meeting, Royal Holloway University of London, UK, May 2010.

[21] "pp -> h + jet -> tau^+ tau^- + jet$ at the LHC", University of Toyama, Japan, April 2010.

[22] "BSM Higgs searches in the gluon fusion process pp -> h +jet -> \tau^+ \tau^- + jet at the LHC", DIS10 - XVIII International Workshop on Deep-Inelastic Scattering and Related Subjects, Florence, Italy, April 2010.

[23] "top FCNC physics at a Linear Collider after the LHC", LCWS10 and ILC10, Beijing, China, March 2010.

[24] "FCNC at the LHC", Workshop on High Energy Physics (WHEPP XI), Ahmedabad, India, January 2010.

[25] "gamma gamma -> hh in 2HDM", LC09, Perugia, Italy, September 2009.

[26] "Double Higgs production at a photon collider", PHOTON2009, DESY, Hamburg, Germany, May 2009.

[27] "Tree-level Vaccum stability in 2(M)HDM", University of Toyama, Japan, April 2009.

[28] "gamma gamma -> hh (AA) in 2HDM", TILC09, Joint ACFA Physics and detector workshop and GDE meeting on International Linear Collider, Tsukuba, Japan, April 2009.

[29] "Higgs pair production in THDM", Workshop on multi-Higgs models, Universidade de Lisboa, Portugal, September 2009.

[30] "Tree-level Vaccum stability in MHDM", Universidade de Southampton, Southampton, UK, November 2008.

[31] "Collaborating with A.B.: Multi-Higgs", Barroso Fest, Universidade de Lisboa, Portugal, October 2008.

[32] "Vacuum stability in 2HDM", cHarged 2008 - Uppsala, Sweden, September 2008.
 
Posters

[1] R. Guedes, P. Ferreira and R. Santos, Lepton Flavour Violation at the International Linear Collider, PHYSICS IN COLLISION - Annecy, France, 26 - 29 june 2007. 

[2] R. Santos, S. Oliveira and A. Barroso, Mass Terms in
Two-Higgs Doublet Models, "XXIX SLAC Summer Institute: Exploring Electroweak Symmetry Breaking", 13 a 24 de Agosto de 2001, Stanford Linear Accelerator Center, Stanford, CA, USA

Grupos




  • Light Higgs searches in t(t)over-bar phi production at the LHC
  • Autor(es):  Duarte Azevedo, Rodrigo Capucha, Emanuel Gouveia, Antonio Onofre, Rui Santos
  • Submissão:  2021-04-09   Aceitação:  2021-04-09   Publicação:  2021-04-09
  • Referência:  J. High Energy Phys. 4 (2021) 77  

  • Models with extended Higgs sectors at future e(+)e(-) colliders
  • Autor(es):  Duarte Azevedo, Pedro Ferreira, M. Margarete Muehlleitner, Rui Santos, Jonas Wittbrodt
  • Submissão:  2019-03-12   Aceitação:  2019-03-12   Publicação:  2019-03-12
  • Referência:  Phys. Rev. D 99 (2019) 055013  

  • CP in the dark
  • Autor(es):  Duarte Azevedo, Pedro M. Ferreira, M. Margarete Muhlleitner, Shruti Patel, Rui Santos, Jonas Wittbrodt
  • Submissão:  2018-11-14   Aceitação:  2018-11-14   Publicação:  2018-11-14
  • Referência:  J. High Energy Phys. 11 (2018) 091  

  • Probing the CP nature of the Higgs coupling in tth events at the LHC
  • Autor(es):  Emanuel Gouveia, S. P. Amor dos Santos, M. C. N. Fiolhais, R. Frederix, R. Gonçalo, R. Martins, A. Onofre, C. M. Pease, H. Peixoto, A. Reigoto, R. Santos, J. Silva
  • Submissão:  2018-01-15   Aceitação:  2018-01-15   Publicação:  2018-01-15
  • Referência:  arXiv:1801.04954  

  • Probing the CP nature of the Higgs coupling in tth events at the LHC
  • Autor(es):  S. Amor dos Santos et al. (12 authors)
  • Submissão:  2017-07-17   Aceitação:  2017-07-17   Publicação:  2017-07-17
  • Referência:  Phys. Rev. D 96 (2017) 013004  

  • Angular distributions in $t{\bar t}H (H\rightarrow b\bar{b})$ reconstructed events at the LHC
  • Autor(es):  S. P. Amor dos Santos, J. P. Araque, R. Cantrill, N. F. Castro, M. C. N. Fiolhais, R. Frederix, R. Gonçalo, R. Martins, R. Santos, J. Silva, A. Onofre, H. Peixoto, A. Reigoto
  • Publicação:  2015-03-26
  • Referência:  Phys.Rev. D92 (2015) 3, 034021  

  • The CP-conserving 2HDM after the 8 TeV run
  • Autor(es):  Rui Santos, P.M. Ferreira, Renato Guedes, John F. Gunion, Howard E. Haber, Marco O.P. Sampaio
  • Publicação:  2014-12-31
  • Referência:  PoS DIS2014 (2014) 127  

  • Wrong sign and symmetric limits and non-decoupling in 2HDMs
  • Autor(es):  P. M. Ferreira, Renato Guedes, Marco O. P. Sampaio, Rui Santos
  • Submissão:  2014-12-09   Aceitação:  2014-12-09   Publicação:  2014-12-09
  • Referência:  J. High Energy Phys. 12 (2014) 067  

  • The CP-conserving 2HDM after the 8 TeV run
  • Autor(es):  P.M. Ferreira, Renato Guedes, John F. Gunion, Howard E. Haber, Marco O. P. Sampaio, Rui Santos
  • Publicação:  2014-07-16
  • Referência:  Conference: C14-04-28.1 Proceedings  

  • Probing wrong-sign Yukawa couplings at the LHC and a future linear collider
  • Autor(es):  P. M. Ferreira, Rui Santos, John F. Gunion, Howard E. Haber
  • Submissão:  2014-06-03   Aceitação:  2014-06-03   Publicação:  2014-06-03
  • Referência:  Phys. Rev. D 89 (2014) 115003  

  • Are there hidden scalars in LHC Higgs results?
  • Autor(es):  A. Arhrib, P. M. Ferreira, Rui Santos
  • Submissão:  2014-03-11   Aceitação:  2014-03-11   Publicação:  2014-03-11
  • Referência:  J. High Energy Phys. 3 (2014) 053  

  • Limits on strong flavor changing neutral current top couplings at the LHC
  • Autor(es):  Renato Guedes, Rui Santos, Miguel Won
  • Publicação:  2013-12-02
  • Referência:  Phys. Rev. D 88 (2013) 114011  

  • MEtop - a top FCNC event generator
  • Autor(es):  Rita Coimbra, Antonio Onofre, Rui Santos, Miguel Won
  • Submissão:  2013-03-15   Publicação:  2013-07-24
  • Referência:  J.Phys.Conf.Ser. 447 (2013) 012031  

  • ScannerS: Constraining the phase diagram of a complex scalar singlet at the LHC
  • Autor(es):  Rita Coimbra, Marco O.P. Sampaio, Rui Santos
  • Submissão:  2013-01-15   Publicação:  2013-05-04
  • Referência:  Eur.Phys.J. C73 (2013) 2428  

  • Mass-degenerate Higgs bosons at 125 GeV in the Two-Higgs-Doublet Model
  • Autor(es):  P.M. Ferreira, Howard E. Haber, Rui Santos, Joao P. Silva.
  • Publicação:  2012-11-15
  • Referência:  PhysRevD.87.055009, arXiv:1211.3131 [hep-ph]  

  • Charged Higgs bosons in single top production at the LHC
  • Autor(es):  Renato Guedes (Lisbon U., CFTC), Stefano Moretti (Southampton U.), Rui Santos (Lisbon, ISEL & Lisbon U., CFTC)
  • Publicação:  2012-07-15
  • Referência:  JHEP 1210 (2012) 119, SHEP-12-02, arXiv:1207.4071 [hep-ph]  

  • Probing the scalar-pseudoscalar mixing in the 125 GeV Higgs particle with current data
  • Autor(es):  A. Barroso (Lisbon, CFTP), P.M. Ferreira, Rui Santos (Lisbon, ISEL & Lisbon, CFTP), Joao P. Silva (Lisbon, ISEL & Lisbon, IST)
  • Publicação:  2012-05-15
  • Referência:  Phys.Rev. D86 (2012) 015022, arXiv:1205.4247 [hep-ph]  

  • Very Light Higgs Bosons in Extended Models at the LHC
  • Autor(es):  A. Belyaev, R. Guedes, S. Moretti and R. Santos
  • Publicação:  2010-09-30
  • Referência:  Phys. Rev. D 81 (2010) 095006  

  • Dimension six FCNC operators and top production at the LHC
  • Autor(es):  R.A. Coimbra, P.M. Ferreira, R.B. Guedes, O. Oliveira, A. Onofre, R. Santos and M. Won
  • Aceitação:  2009-01-06   Publicação:  2009-01-06
  • Referência:  Phys.Rev. D79 (2009) 014006, (arXiv:0811.1743 [hep-ph])  

  • Collider aspects of flavor physics at high Q
  • Autor(es):  T. Lari et al. (111 authors)
  • Submissão:  2008-01-14   Aceitação:  2008-01-14   Publicação:  2008-01-14
  • Referência:  Eur. Phys. J. C, 57, 183 (2008)  

  • Search for a fourth generation b' -quark at LEP-II at sqrt(s)=196-209 GeV
  • Autor(es):  J. Abdallah et al. (The DELPHI Collaboration)
  • Submissão:  2006-07-26   Aceitação:  2007-01-28   Publicação:  2007-03-29
  • Referência:  Eur. Phys, Journal, Volume 50 (2007) p.507-518  



Ver todas as publicações do grupo



Catarina Quintans, Lisboa
Investigadora

Celso Franco, Lisboa
Investigador

Christophe Pires, Lisboa
Técnico

Gonçalo Terça, External
Técnico

Luís Silva, Lisboa
Investigador

Marcin Stolarski, Lisboa
Investigador

Paula Bordalo, Lisboa
Investigadora

Sérgio Ramos, Lisboa
Investigador

Sofia Nunes, Lisboa
Estudante de Doutoramento

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