Inclusive cross section and double-helicity asymmetry for π0 production at midrapidity in p+p collisions at √s = 510 GeV
PHENIX Collaboration. (2016). Inclusive cross section and double-helicity asymmetry for π0 production at midrapidity in p+p collisions at √s = 510 GeV. Physical Review D, 93(1), Article 011501. https://doi.org/10.1103/PhysRevD.93.011501
Published inPhysical Review D
© 2016 American Physical Society. Published in this repository with the kind permission of the publisher.
PHENIX measurements are presented for the cross section and double-helicity asymmetry (ALL) in inclusive π0 production at midrapidity from p þ p collisions at ffiffi s p ¼ 510 GeV from data taken in 2012 and 2013 at the Relativistic Heavy Ion Collider. The next-to-leading-order perturbative-quantumchromodynamics theory calculation is in excellent agreement with the presented cross section results. The calculation utilized parton-to-pion fragmentation functions from the recent DSS14 global analysis, which prefer a smaller gluon-to-pion fragmentation function. The π0ALL results follow an increasingly positive asymmetry trend with pT and ffiffi s p with respect to the predictions and are in excellent agreement with the latest global analysis results. This analysis incorporated earlier results on π0 and jet ALL and suggested a positive contribution of gluon polarization to the spin of the proton ΔG for the gluon momentum fraction range x > 0.05. The data presented here extend to a currently unexplored region, down to x ∼ 0.01, and thus provide additional constraints on the value of ΔG. ...
PublisherAmerican Physical Society
ISSN Search the Publication Forum1550-7998
Publication in research information system
MetadataShow full item record
Showing items with similar title or keywords.
Measurement of parity-violating spin asymmetries in W± production at midrapidity in longitudinally polarized p+p collisions PHENIX Collaboration (American Physical Society, 2016)We present midrapidity measurements from the PHENIX experiment of large parity-violating singlespin asymmetries of high transverse momentum electrons and positrons from W =Z decays, produced in longitudinally polarized ...
Measurement of transverse-single-spin asymmetries for midrapidity and forward-rapidity production of hadrons in polarized p plus p collisions at root s=200 and 62.4 GeV Adare, A.; Afanasiev, S.; Aidala, C.; Ajitanand, N. N.; Akiba, Y.; Al-Bataineh, H.; Alexander, J.; Angerami, A.; Aoki, K.; Apadula, N.; Kim, Dong Jo; Rak, Jan (American Physical Society, 2014)[Introduction] Measurements of transverse-single-spin asymmetries ( A N )in p þ p collisions at ffiffiffi s p ¼ 62 . 4 and 200 GeV with the PHENIX detector at the Relativistic Heavy Ion Collider are presented. ...
Measurement of the production cross section of prompt Ξ0c baryons at midrapidity in pp collisions at √s = 5.02 TeV ALICE collaboration (Springer, 2021)The transverse momentum (pT) differential cross section of the charm-strange baryon Ξ0c is measured at midrapidity (|y| < 0.5) via its semileptonic decay into e+Ξ−νe in pp collisions at √s = 5.02 TeV with the ALICE detector ...
Charm-quark fragmentation fractions and production cross section at midrapidity in pp collisions at the LHC ALICE Collaboration (American Physical Society, 2022)Recent pT-integrated cross-section measurements of the ground-state charm mesons and baryons, D0, D+, Ds+, Λc+, and Ξc0, are used to evaluate the charm fragmentation fractions and production cross section per unit of ...
Prompt and non-prompt J/ψ production cross sections at midrapidity in proton-proton collisions at √s = 5.02 and 13 TeV ALICE collaboration (Springer, 2022)The production of J/ψ is measured at midrapidity (|y| < 0.9) in proton-proton collisions at √s = 5.02 and 13 TeV, through the dielectron decay channel, using the ALICE detector at the Large Hadron Collider. The data sets ...