Measurement of the W -> e? and Z/?* -> e+e- Production Cross Sections at Mid-rapidity in Proton-Proton Collisions at root s = 500 GeV

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21340%2F12%3A00193511" target="_blank" >RIV/68407700:21340/12:00193511 - isvavai.cz</a>

Result on the web

<a href="http://arxiv.org/pdf/1112.2980.pdf" target="_blank" >http://arxiv.org/pdf/1112.2980.pdf</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1103/PhysRevD.85.092010" target="_blank" >10.1103/PhysRevD.85.092010</a>

Result language

angličtina

Original language name

Measurement of the W -> e? and Z/?* -> e+e- Production Cross Sections at Mid-rapidity in Proton-Proton Collisions at root s = 500 GeV

Original language description

We report measurements of the charge-separated W +(-) -> e+(-) + ?e(? e) and Z/?* -> e+e- root production cross sections at mid-rapidity in proton-proton collisions at s = 500 GeV. These results are based on 13.2 pb-1 of data recorded in 2009 by the STARdetector at RHIC. Production cross sections for W bosons that decay via the e? channel were measured to be ?(pp -> W+X).BR(W+ -> e+ ?e) = 117.3 ? 5.9(stat) ? 6.2(syst) ? 15.2(lumi) pb, and ?(pp -> W-X).BR(W- -> e- ? e) = 43.3 ? 4.6(stat) ? 3.4(syst) ? 5.6(lumi) pb. For Z/?* production, ?(pp -> Z/?* X) . BR(Z/?* -> e+e-) = 7.7 ? 2.1(stat) +0.5(syst) ? 1.0(lumi) pb for di-lepton invariant masses m + - between 70 and -0.9 ee root 110 GeV/c2. First measurements of the W cross section ratio, ?(pp -> W+X)/?(pp -> W-X), at s = 500 GeV are also reported.

Czech name

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Czech description

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Type

J_x - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)

CEP classification

BF - Elementary particle theory and high energy physics

OECD FORD branch

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Project

<a href="/en/project/LA09013" target="_blank" >LA09013: Participation of the Czech Republic in the STAR experiment at Brookhaven National Laboratory, U.S.A.</a><br>

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>Z - Vyzkumny zamer (s odkazem do CEZ)<br>S - Specificky vyzkum na vysokych skolach

Publication year

2012

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Physical Review D

ISSN

1550-7998

e-ISSN

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Volume of the periodical

85

Issue of the periodical within the volume

9

Country of publishing house

US - UNITED STATES

Number of pages

14

Pages from-to

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UT code for WoS article

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EID of the result in the Scopus database

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