Measurement of the W -> e nu and Z/gamma* -> 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%2F61389005%3A_____%2F12%3A00486433" target="_blank" >RIV/61389005:_____/12:00486433 - isvavai.cz</a>

Result on the web

<a href="http://dx.doi.org/10.1103/PhysRevD.85.092010" target="_blank" >http://dx.doi.org/10.1103/PhysRevD.85.092010</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 nu and Z/gamma* -> 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(+(-))+nu(e)(nu-(e)) and Z/gamma*-> e(+)e(-) production cross sections at mid-rapidity in proton-proton collisions at root s=500 GeV. These results are based on 13.2 pb(-1) of data recorded in 2009 by the STAR detector at RHIC. Production cross sections for W bosons that decay via the e nu channel were measured to be sigma(pp -> W+X)center dot BR(W+-> e(+)nu e)=117.3 +/- 5.9(stat)+/- 6.2(syst)+/- 15.2(lumi) pb, and sigma(pp -> W-X)center dot BR(W--> e(-)(nu)over bar(-)e)=43.3 +/- 4.6(stat)+/- 3.4(syst)+/- 5.6(lumi) pb. For Z/gamma* production, sigma(pp -> Z/gamma*X)center dot BR(Z/gamma*-> e(+)e(-))=7.7 +/- 2.1(stat)-0.9+0.5(syst)+/- 1.0(lumi) pb was measured for di-lepton invariant masses m(e+e-) between 70 and 110 GeV/c(2). First measurements of the W cross section ratio, sigma(pp -> W+X)/sigma(pp -> W-X), at root v=500 GeV are also reported. Theoretical predictions, calculated using recent parton distribution functions, are found to agree with the measured cross sections.

Czech name

—

Czech description

—

Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

10303 - Particles and field physics

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

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

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

2470-0010

e-ISSN

—

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

—

UT code for WoS article

000304105400003

EID of the result in the Scopus database

2-s2.0-84861678540