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Search for anomalous production of highly boosted Z bosons decaying to μ^+μ^− in proton–proton collisions at √s = 7 TeV

Chatrchyan, S. and Apresyan, A. and Bornheim, A. and Chen, Y. and Di Marco, E. and Duarte, J. and Gataullin, M. and Ma, Y. and Mott, A. and Newman, H. B. and Rogan, C. and Spiropulu, M. and Timciuc, V. and Veverka, J. and Wilkinson, R. and Xie, S. and Yang, Y. and Zhu, R. Y. and Dias, F. A. and Dubinin, M. (2013) Search for anomalous production of highly boosted Z bosons decaying to μ^+μ^− in proton–proton collisions at √s = 7 TeV. Physics Letters B, 722 (1-3). pp. 28-47. ISSN 0370-2693. http://resolver.caltech.edu/CaltechAUTHORS:20130620-111054700

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Abstract

Results are reported from a search for the anomalous production of highly boosted Z bosons with large transverse momentum and decaying to μ^+μ^−. Such Z bosons may be produced in the decays of new heavy particles. The search uses pp collision data at √s = 7 TeV, corresponding to an integrated luminosity of 5.0 fb^(−1) recorded with the CMS detector. The shape of the observed transverse momentum distribution of Z bosons is consistent with standard model expectations. Constraints are obtained on models predicting the production of excited quarks decaying via electroweak processes. Assuming a compositeness scale that is equal to the excited quark mass as well as transition coupling strengths between Z bosons and excited quarks that are equal to standard model couplings to quarks, masses of excited quarks below 1.94 TeV are excluded at the 95% confidence level. For excited quark production via a novel contact interaction, masses below 2.22 TeV are excluded, even if the excited quarks do not couple to gluons.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1016/j.physletb.2013.03.037DOIUNSPECIFIED
http://www.sciencedirect.com/science/article/pii/S0370269313002621PublisherUNSPECIFIED
Additional Information:2013 CERN. Published by Elsevier B.V. © CERN for the benefit of the CMS Collaboration. Received 2 October 2012. Received in revised form 4 March 2013. Accepted 25 March 2013. Available online 28 March 2013. Editor: M. Doser. This article is published Open Access at sciencedirect.com. It is distributed under the terms of the Creative Commons Attribution License 3.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original authors and source are credited. We congratulate our colleagues in the CERN accelerator departments for the excellent performance of the LHC machine. We thank the technical and administrative staff at CERN and other CMS institutes, and acknowledge support from BMWF and FWF (Austria); FNRS and FWO (Belgium); CNPq, CAPES, FAPERJ, and FAPESP (Brazil); MEYS (Bulgaria); CERN; CAS, MoST, and NSFC (China); COLCIENCIAS (Colombia); MSES (Croatia); RPF (Cyprus); MoER, SF0690030s09 and ERDF (Estonia); Academy of Finland, MEC, and HIP (Finland); CEA and CNRS/IN2P3 (France); BMBF, DFG, and HGF (Germany); GSRT (Greece); OTKA and NKTH (Hungary); DAE and DST (India); IPM (Iran); SFI (Ireland); INFN (Italy); NRF and WCU (Korea); LAS (Lithuania); CINVESTAV, CONACYT, SEP, and UASLP-FAI (Mexico); MSI (New Zealand); PAEC (Pakistan); MSHE and NSC (Poland); FCT (Portugal); JINR (Armenia, Belarus, Georgia, Ukraine, Uzbekistan); MON, RosAtom, RAS and RFBR (Russia); MSTD (Serbia); SEIDI and CPAN (Spain); Swiss Funding Agencies (Switzerland); NSC (Taipei); ThEP, IPST and NECTEC (Thailand); TUBITAK and TAEK (Turkey); NASU (Ukraine); STFC (United Kingdom); DOE and NSF (USA).
Group:CMS@Caltech
Funders:
Funding AgencyGrant Number
BMWF and FWF (Austria)UNSPECIFIED
FNRS and FWO (Belgium) UNSPECIFIED
CNPq (Brazil)UNSPECIFIED
CAPES (Brazil)UNSPECIFIED
FAPERJ (Brazil)UNSPECIFIED
FAPESP (Brazil)UNSPECIFIED
MEYS (Bulgaria)UNSPECIFIED
CERNUNSPECIFIED
CASUNSPECIFIED
MoST (China)UNSPECIFIED
NSFC (China)UNSPECIFIED
COLCIENCIAS (Colombia)UNSPECIFIED
MSES (Croatia)UNSPECIFIED
RPF (Cyprus) UNSPECIFIED
MoERSF0690030s09
ERDF (Estonia)UNSPECIFIED
Academy of FinlandUNSPECIFIED
MEC (Finland)UNSPECIFIED
HIP (Finland)UNSPECIFIED
CEA and CNRS/IN2P3 (France)UNSPECIFIED
BMBF (Germany)UNSPECIFIED
DFG (Germany)UNSPECIFIED
HGF (Germany)UNSPECIFIED
GSRT (Greece)UNSPECIFIED
OTKA and NKTH (Hungary) UNSPECIFIED
DAE and DST (India) UNSPECIFIED
IPM (Iran)UNSPECIFIED
SFI (Ireland)UNSPECIFIED
INFN (Italy)UNSPECIFIED
NRF and WCU (Korea)UNSPECIFIED
LAS (Lithuania)UNSPECIFIED
CINVESTAV (Mexico)UNSPECIFIED
CONACyT (Mexico)UNSPECIFIED
SEP and UASLP-FAI (Mexico)UNSPECIFIED
MSI (New Zealand)UNSPECIFIED
PAEC (Pakistan)UNSPECIFIED
MSHE and NSC (Poland)UNSPECIFIED
FCT (Portugal)UNSPECIFIED
JINR (Armenia, Belarus, Georgia, Ukraine, Uzbekistan)UNSPECIFIED
MONUNSPECIFIED
RosAtom UNSPECIFIED
RAS and RFBR (Russia)UNSPECIFIED
MSTD (Serbia)UNSPECIFIED
SEIDI and CPAN (Spain)UNSPECIFIED
Swiss Funding Agencies (Switzerland)UNSPECIFIED
NSC (Taipei)UNSPECIFIED
ThEPUNSPECIFIED
IPST and NECTEC (Thailand)UNSPECIFIED
TUBITAK and TAEK (Turkey) UNSPECIFIED
NASU (Ukraine)UNSPECIFIED
STFC (United Kingdom)UNSPECIFIED
Department of Energy (DOE)UNSPECIFIED
NSFUNSPECIFIED
Subject Keywords: CMS; Physics; Dimuons; New phenomena; Excited quarks
Record Number:CaltechAUTHORS:20130620-111054700
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:20130620-111054700
Official Citation:CMS Collaboration, Search for anomalous production of highly boosted Z bosons decaying to in proton–proton collisions at, Physics Letters B, Volume 722, Issues 1–3, 13 May 2013, Pages 28-47, ISSN 0370-2693, http://dx.doi.org/10.1016/j.physletb.2013.03.037. (http://www.sciencedirect.com/science/article/pii/S0370269313002621)
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:38998
Collection:CaltechAUTHORS
Deposited By: Ruth Sustaita
Deposited On:20 Jun 2013 18:35
Last Modified:20 Jun 2013 18:35

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