Bibcode
Khachatryan, V.; Sirunyan, A. M.; Tumasyan, A.; Adam, W.; Asilar, E.; Bergauer, T.; Brandstetter, J.; Brondolin, E.; Dragicevic, M.; Erö, J.; Flechl, M.; Friedl, M.; Frühwirth, R.; Ghete, V. M.; Hartl, C.; Hörmann, N.; Hrubec, J.; Jeitler, M.; König, A.; Krätschmer, I.; Liko, D.; Matsushita, T.; Mikulec, I.; Rabady, D.; Rad, N.; Rahbaran, B.; Rohringer, H.; Schieck, J.; Strauss, J.; Treberer-Treberspurg, W.; Waltenberger, W.; Wulz, C.-E.; Mossolov, V.; Shumeiko, N.; Suarez Gonzalez, J.; Alderweireldt, S.; De Wolf, E. A.; Janssen, X.; Lauwers, J.; Van De Klundert, M.; Van Haevermaet, H.; Van Mechelen, P.; Van Remortel, N.; Van Spilbeeck, A.; Abu Zeid, S.; Blekman, F.; D'Hondt, J.; Daci, N.; De Bruyn, I.; Deroover, K.; Heracleous, N.; Lowette, S.; Moortgat, S.; Moreels, L.; Olbrechts, A.; Python, Q.; Tavernier, S.; Van Doninck, W.; Van Mulders, P.; Van Parijs, I.; Brun, H.; Caillol, C.; Clerbaux, B.; De Lentdecker, G.; Delannoy, H.; Fasanella, G.; Favart, L.; Goldouzian, R.; Grebenyuk, A.; Karapostoli, G.; Lenzi, T.; Léonard, A.; Luetic, J.; Maerschalk, T.; Marinov, A.; Randle-conde, A.; Seva, T.; Vander Velde, C.; Vanlaer, P.; Yonamine, R.; Zenoni, F.; Zhang, F.; Cimmino, A.; Cornelis, T.; Dobur, D.; Fagot, A.; Garcia, G.; Gul, M.; Poyraz, D.; Salva, S.; Schöfbeck, R.; Sharma, A.; Tytgat, M.; Van Driessche, W.; Yazgan, E.; Zaganidis, N.; Bakhshiansohi, H.; Beluffi, C.; Bondu, O.; Brochet, S. et al.
Bibliographical reference
Physics Letters B, Volume 768, p. 57-80.
Advertised on:
5
2017
Citations
46
Refereed citations
43
Description
A search for narrow resonances in dielectron and dimuon invariant mass
spectra has been performed using data obtained from proton-proton
collisions at √{ s} = 13 TeV collected with the CMS detector. The
integrated luminosity for the dielectron sample is 2.7 fb-1
and for the dimuon sample 2.9 fb-1. The sensitivity of the
search is increased by combining these data with a previously analyzed
set of data obtained at √{ s} = 8 TeV and corresponding to a
luminosity of 20 fb-1. No evidence for non-standard-model
physics is found, either in the 13 TeV data set alone, or in the
combined data set. Upper limits on the product of production cross
section and branching fraction have also been calculated in a
model-independent manner to enable interpretation in models predicting a
narrow dielectron or dimuon resonance structure. Limits are set on the
masses of hypothetical particles that could appear in new-physics
scenarios. For the ZSSM‧ particle, which
arises in the sequential standard model, and for the superstring
inspired Zψ‧ particle, 95% confidence
level lower mass limits for the combined data sets and combined channels
are found to be 3.37 and 2.82 TeV, respectively. The corresponding
limits for the lightest Kaluza-Klein graviton arising in the
Randall-Sundrum model of extra dimensions with coupling parameters 0.01
and 0.10 are 1.46 and 3.11 TeV, respectively. These results
significantly exceed the limits based on the 8 TeV LHC data.