Abstract.
The results of searches for physics beyond the standard model with photons in the final state are presented. Events were collected at center-of-mass energies of 7 and 8 TeV in proton-proton collisions during the first run of the LHC data taking between 2011 and 2015 and analyzed with the general-purpose detector of the Compact Muon Solenoid experiment. A search for long-lived particles which decay to photons is first presented. This is the first search at CMS which exploits information of the time measurement made with the CMS electromagnetic calorimeter to identify displaced photons. A model-independent search for new heavy scalars in the diphoton final state is also described. The search, covering the mass range between 150 GeV and 850 GeV, is extended to resonances with natural width up to 10% of the mass. Results obtained in both searches significantly extend previous searches results in terms of mass, width and lifetime ranges.
Similar content being viewed by others
References
CMS Collaboration, J. Phys. G: Nucl. Part. Phys. 34, 995 (2007)
CMS Collaboration, Phys. Lett. B 722, 273 (2013)
CMS Collaboration, Phys. Lett. B 750, 494 (2015)
Thomas Sven Pettersson, P. Lefvre, The Large Hadron Collider: conceptual design, Technical Report CERN-AC-95-05 LHC, CERN, Geneva, Oct. 1995
CMS Collaboration, J. Phys. G: Nucl. Part. Phys. 34, 995 (2007)
J. Beringer, J. Arguin, Phys. Rev. D 86, 010001 (2012)
A.A. Annenkov, M.V. Korzhik, P. Lecoq, Nucl. Instrum. Methods Phys. Res. Sect. A 490, 30 (2002)
CMS Collaboration, JINST 10, P08010 (2015) arXiv:1502.02702, CMS-EGM-14-001, CERN-PH-EP-2015-006
CMS Collaboration, JINST 5, T03011 (2010)
Serguei Chatrchyan et al., JHEP 07, 122 (2013)
Matteo Cacciari, Gavin P. Salam, Phys. Lett. B 659, 119 (2008)
Matthew J. Strassler, Kathryn M. Zurek, Phys. Lett. B 651, 374 (2007)
G.F. Giudice, R. Rattazzi, Phys. Rep. 322, 419 (1999)
Glennys R. Farrar, Pierre Fayet, Phys. Lett. B 76, 575 (1978)
B.C. Allanach et al., Eur. Phys. J. C 25, 113 (2002)
Savas Dimopoulos, Michael Dine, Stuart Raby, Scott D. Thomas, Phys. Rev. Lett. 76, 3494 (1996)
ATLAS and CMS Collaborations, Procedure for the lhc higgs boson search combination in summer 2011, ATL-PHYS-PUB 2011-011 (2011) CMS NOTE-2011/005
Thomas Junk, Nucl. Instrum. Methods A 434, 435 (1999)
Alexander L. Read, J. Phys. G 28, 2693 (2002)
Glen Cowan, Kyle Cranmer, Eilam Gross, Ofer Vitells, Eur. Phys. J. C 71, 1554 (2011)
Vardan Khachatryan et al., Eur. Phys. J. C 74, 3076 (2014)
Georges Aad et al., Phys. Rev. D 90, 112015 (2014)
Nathaniel Craig, Jamison Galloway, Scott Thomas, Searching for Signs of the Second Higgs Doublet, arXiv:1305.2424 (2013)
P.S. Bhupal Dev, Apostolos Pilaftsis, JHEP 12, 024 (2014)
L.D. Landau, Dokl. Akad. Nauk. SSSR 60, 207 (1948)
Lisa Randall, Raman Sundrum, Phys. Rev. Lett. 83, 3370 (1999)
Nima Arkani-Hamed, Savas Dimopoulos, G.R. Dvali, Phys. Lett. B 429, 263 (1998)
Serguei Chatrchyan et al., Phys. Lett. B 710, 403 (2012)
Serguei Chatrchyan et al., JHEP 01, 133 (2012)
Serguei Chatrchyan et al., Phys. Lett. B 700, 187 (2011)
A.L. Read, J. Phys. G: Nucl. Part. Phys. 28, 2693 (2002)
ATLAS and CMS Collaborations, LHC Higgs Combination Group, Procedure for the lhc higgs boson search combination in summer 2011, Technical Report ATL-PHYS-PUB 2011-11, CMS NOTE 2011/005 (2011)
M.J. Oreglia, A study of the reactions $\psi^{\prime} \rightarrow \gamma \gamma \psi$, PhD thesis, Stanford University (1980) SLAC Report SLAC-R-236, see appendix D
S. Heinemeyer, Handbook of LHC Higgs cross sections: 3, Higgs properties, Technical report (2013)
Vardan Khachatryan et al., Phys. Rev. Lett. 105, 211801 (2010)
CMS Collaboration, CMS luminosity based on pixel cluster counting - summer 2013 update, CMS Physics Analysis Summary CMS-PAS-LUM-13-001 (2013)
Robert V. Harlander, Stefan Liebler, Hendrik Mantler, Comput. Phys. Commun. 184, 1605 (2013)
David Eriksson, Johan Rathsman, Oscar Stal, Comput. Phys. Commun. 181, 189 (2010)
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
About this article
Cite this article
Soffi, L. Search for new exotic particles decaying to photons with the CMS experiment at the LHC. Eur. Phys. J. Plus 131, 283 (2016). https://doi.org/10.1140/epjp/i2016-16283-3
Received:
Accepted:
Published:
DOI: https://doi.org/10.1140/epjp/i2016-16283-3