Measurement of the and Production Cross Sections at Mid-rapidity in Proton-Proton Collisions at = 500 GeV
G Agakishiev, MM Aggarwal, Z Ahammed… - arXiv preprint arXiv …, 2011 - arxiv.org
G Agakishiev, MM Aggarwal, Z Ahammed, AV Alakhverdyants, I Alekseev, J Alford…
arXiv preprint arXiv:1112.2980, 2011•arxiv.orgWe report measurements of the charge-separated $ W^{+(-)}\to e^{+(-)}+\nu_e (\bar {\nu} _e)
$ and $ Z/\gamma^*\to e^+ e^-$ production cross sections at mid-rapidity in proton-proton
collisions at $\sqrt {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\to W^+ X)\cdot BR (W^+\to
e^+\nu_e) $= 117.3\pm 5.9 (stat)\pm 6.2 (syst)\pm 15.2 (lumi) pb, and $\sigma (pp\to W …
$ and $ Z/\gamma^*\to e^+ e^-$ production cross sections at mid-rapidity in proton-proton
collisions at $\sqrt {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\to W^+ X)\cdot BR (W^+\to
e^+\nu_e) $= 117.3\pm 5.9 (stat)\pm 6.2 (syst)\pm 15.2 (lumi) pb, and $\sigma (pp\to W …
We report measurements of the charge-separated and production cross sections at mid-rapidity in proton-proton collisions at = 500 GeV. These results are based on 13.2 pb of data recorded in 2009 by the STAR detector at RHIC. Production cross sections for W bosons that decay via the channel were measured to be = 117.3 \pm 5.9(stat) \pm 6.2(syst) \pm 15.2(lumi) pb, and = 43.3 \pm 4.6(stat) \pm 3.4(syst) \pm 5.6(lumi) pb. For production, = 7.7 \pm 2.1(stat) (syst) \pm 1.0(lumi) pb for di-lepton invariant masses between 70 and 110 GeV/. First measurements of the W cross section ratio, , at = 500 GeV are also reported. Theoretical predictions, calculated using recent parton distribution functions, are found to agree with the measured cross sections.
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