نویسنده
Chatrchyan, S., Işıldak, Bora
تاریخ انتشار
2012
محل انتشار
-
Elsevier
موضوع
Physics, Heavy-ions, W bosons, CMS
نوع
دوره ای
زبان
انگلیسی
دیجیتال
بله
نسخه خطی
خیر
کتابخانه
دانشگاه اوزیغین
شناسه دارایی کتابخانه
0370-2693
شماره ثبت
041be70d-4833-4512-8577-a4ee91fd7d3b
محل کتابخانه
Natural and Mathematical Sciences
تاریخ
2012
یادداشتها
FMSR ; FNRS and FWO ; CNPq, CAPES, FAPERJ, and FAPESP ; MES ; CERN; CAS, MoST, and NSFC ; COLCIENCIAS ; MSES; RPF ; Academy of Sciences and NICPB ; Academy of Finland, ME, and HIP ; CEA and CNRS/IN2P3 ; BMBF, DFG, and HGF ; GSRT ; OTKA and NKTH ; DAE and DST ; IPM ; SFI ; INFN ; NRF and WCU ; LAS ; CINVESTAV, CONACYT, SEP, and UASLP-FAI ; PAEC ; SCSR ; FCT ; JINR ; MST and MAE ; MSTD ; MICINN and CPAN ; Swiss Funding Agencies ; NSC ; TUBITAK and TAEK ; STFC ; DOE and NSF ; Marie-Curie programme and the European Research Council ; the Leventis Foundation; the A.P. Sloan Foundation; the Alexander von Humboldt Foundation; the Belgian Federal Science Policy Office; the Fonds pour la Formation à la Recherche dans lʼIndustrie et dans lʼAgriculture ; the Agentschap voor Innovatie door Wetenschap en Technologie ; and the Council of Science and Industrial Research, India.
متن نمونه
A measurement is presented of W-boson production in PbPb collisions carried out at a nucleon-nucleon (NN) centre-of-mass energy root S-NN of 2.76 TeV at the LHC using the CMS detector. In data corresponding to an integrated luminosity of 7.3 mu b(-1), the number of W -> mu v(mu) decays is extracted in the region of muon pseudorapidity vertical bar eta mu vertical bar < 2.1 and transverse momentum p(T)(mu) > 25 GeV/c. Yields of muons found per unit of pseudorapidity correspond to (159 +/- 10(stat.) +/- 12(syst.)) x 10(-8) W and (154 +/- 10(stat.) +/- 12(syst.)) x 10(-8) W- bosons per minimum-bias PbPb collision. The dependence of W production on the centrality of PbPb collisions is consistent with a scaling of the yield by the number of incoherent NN collisions. The yield of W bosons is also studied in a sample of pp interactions at root S = 2.76 TeV corresponding to an integrated luminosity of 231 nb(-1). The individual W+ and W- yields in PbPb and pp collisions are found to agree, once the neutron and proton content in Pb nuclei is taken into account. Likewise, the difference observed in the dependence of the positive and negative muon production on pseudorapidity is consistent with next-to-leading-order perturbative QCD calculations.
DOI
10.1016/j.physletb.2012.07.025
Cilt
715
