Chatrchyan, S. and Dubinin, M. and Spiropulu, M. and Apresyan, A. and Bornheim, A. and Bunn, J. and Chen, Y. and Gataullin, M. and Ma, Y. and Mott, A. and Newman, H. B. and Rogan, C. and Shin, K. and Timciuc, V. and Traczyk, P. and Veverka, J. and Wilkinson, R. and Yang, Y. and Zhu, R. Y. (2011) Measurement of the inclusive Z cross section via decays to tau pairs in pp collisions at √s = 7 TeV. Journal of High Energy Physics, 2011 (8). Art. No. 117. ISSN 1126-6708 http://resolver.caltech.edu/CaltechAUTHORS:20111115-110057375
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Use this Persistent URL to link to this item: http://resolver.caltech.edu/CaltechAUTHORS:20111115-110057375
The first measurement of inclusive Z → τ^+ τ^− production in pp collisions at the LHC is presented, in the final states μ + hadrons, e + hadrons, e + μ, and μ + μ. The data sample corresponds to an integrated luminosity of 36 pb^(−1) collected with the CMS detector. The measured cross section is σ (pp → ZX) × B (Z → τ^+ τ^−) = 1.00 ± 0.05(stat.) ± 0.08(syst.) ± 0.04(lumi.)nb, which is in good agreement with the next-to-next-to-leading order QCD prediction and improves on previous measurements in the Z → e^+e^− and μ^+ μ^− channels. The reconstruction efficiency for hadronic τ decays is determined with a precision of 7%.
|Additional Information:||© 2011 CERN for the benet of the CMS collaboration. This article is distributed under the terms of the Creative Commons Attribution Noncommercial License which permits any noncommercial use, distribution, and reproduction in any medium, provided the original author(s) and source are credited. Received: May 3, 2011. Revised: July 1, 2011. Accepted: August 3, 2011. Published: August 25, 2011. We wish to congratulate our colleagues in the CERN accelerator departments for the excellent performance of the LHC machine. We thank the technical and administrative sta at CERN and other CMS institutes, and acknowledge support from: FMSR (Austria); FNRS and FWO (Belgium); CNPq, CAPES, FAPERJ, and FAPESP (Brazil); MES (Bulgaria); CERN; CAS, MoST, and NSFC (China); COLCIENCIAS (Colombia); MSES (Croatia); RPF (Cyprus); Academy of Sciences and NICPB (Estonia); Academy of Finland, ME, 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 (Korea); LAS (Lithuania); CINVESTAV, CONACYT, SEP, and UASLP-FAI (Mexico); PAEC (Pakistan); SCSR (Poland); FCT (Portugal); JINR (Armenia, Belarus, Georgia, Ukraine, Uzbekistan); MST and MAE (Russia); MSTDS (Serbia); MICINN and CPAN (Spain); Swiss Funding Agencies (Switzerland); NSC (Taipei); TUBITAK and TAEK (Turkey); STFC (United Kingdom); DOE and NSF (USA).|
|Subject Keywords:||Hadron-Hadron Scattering|
|Official Citation:||Measurement of the inclusive Z cross section via decays to tau pairs in pp collisions at √s=7 TeV The CMS collaboration, S. Chatrchyan, V. Khachatryan, A. M. Sirunyan and A. Tumasyan, et al|
|Usage Policy:||No commercial reproduction, distribution, display or performance rights in this work are provided.|
|Deposited By:||Ruth Sustaita|
|Deposited On:||15 Nov 2011 21:30|
|Last Modified:||25 Feb 2013 23:20|
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