Measurement of the W→eν and Z/γ∗→e+e− production cross sections at mid-rapidity in proton-proton collisions at √s=500 GeV
| dc.citation.firstpage | 92010 | |
| dc.citation.issueNumber | 9 | |
| dc.citation.journalTitle | Physical Review D | |
| dc.citation.volumeNumber | 85 | |
| dc.contributor.author | STAR Collaboration | |
| dc.date.accessioned | 2015-05-15T19:06:38Z | |
| dc.date.available | 2015-05-15T19:06:38Z | |
| dc.date.issued | 2012 | |
| dc.description.abstract | We report measurements of the charge-separated W+(−)→e+(−)+νe(ν¯e) and Z/γ∗→e+e− 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 STAR detector at RHIC. Production cross sections for W bosons that decay via the eν channel were measured to be σ(pp→W+X)⋅BR(W+→e+νe)=117.3±5.9(stat)±6.2(syst)±15.2(lumi) pb, and σ(pp→W−X)⋅BR(W−→e−ν¯e)=43.3±4.6(stat)±3.4(syst)±5.6(lumi) pb. For Z/γ∗ production, σ(pp→Z/γ∗X)⋅BR(Z/γ∗→e+e−)=7.7±2.1(stat)+0.5−0.9(syst)±1.0(lumi) pb was measured for di-lepton invariant masses me+e− between 70 and 110 GeV/c2. First measurements of the W cross section ratio, σ(pp→W+X)/σ(pp→W−X), at √s=500 GeV are also reported. Theoretical predictions, calculated using recent parton distribution functions, are found to agree with the measured cross sections. | |
| dc.identifier.citation | STAR Collaboration. "Measurement of the W→eν and Z/γ∗→e+e− production cross sections at mid-rapidity in proton-proton collisions at √s=500 GeV." <i>Physical Review D,</i> 85, no. 9 (2012) American Physical Society: 92010. http://dx.doi.org/10.1103/PhysRevD.85.092010. | |
| dc.identifier.doi | http://dx.doi.org/10.1103/PhysRevD.85.092010 | |
| dc.identifier.uri | https://hdl.handle.net/1911/80227 | |
| dc.language.iso | eng | |
| dc.publisher | American Physical Society | |
| dc.rights | Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use. | |
| dc.title | Measurement of the W→eν and Z/γ∗→e+e− production cross sections at mid-rapidity in proton-proton collisions at √s=500 GeV | |
| dc.type | Journal article | |
| dc.type.dcmi | Text | |
| dc.type.publication | publisher version |
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