Search results for "single-spin asymmetry"

showing 5 items of 5 documents

Collins and Sivers asymmetries for pions and kaons in muon-deuteron DIS

2008

The measurements of the Collins and Sivers asymmetries of identified hadrons produced in deep-inelastic scattering of 160 GeV/c muons on a transversely polarised 6LiD target at COMPASS are presented. The results for charged pions and charged and neutral kaons correspond to all data available, which were collected from 2002 to 2004. For all final state particles both the Collins and Sivers asymmetries turn out to be small, compatible with zero within the statistical errors, in line with the previously published results for not identified charged hadrons, and with the expected cancellation between the u- and d-quark contributions.

QuarkNuclear and High Energy PhysicsParticle physicsSivers asymmetryHadronNuclear TheoryFOS: Physical sciences01 natural sciencesCOMPASSHigh Energy Physics - ExperimentNuclear physicsHigh Energy Physics - Experiment (hep-ex)PionIdentifiedCompass0103 physical sciencesTransverse spin effects; Deuteron; Collins asymmetry; Sivers asymmetry; COMPASSDeuteronTransverse spin effect010306 general physicsNuclear ExperimentPhysicsMuon010308 nuclear & particles physicsScatteringHigh Energy Physics::PhenomenologyTransverse single-spin asymmetryTransverse spin effectsCollins asymmetryhadronsDeuteriumTransversityHigh Energy Physics::Experiment
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A new measurement of the Collins and Sivers asymmetries on a transversely polarised deuteron target

2007

New high precision measurements of the Collins and Sivers asymmetries of charged hadrons produced in deep-inelastic scattering of muons on a transversely polarised 6LiD target are presented. The data were taken in 2003 and 2004 with the COMPASS spectrometer using the muon beam of the CERN SPS at 160 GeV/c. Both the Collins and Sivers asymmetries turn out to be compatible with zero, within the present statistical errors, which are more than a factor of 2 smaller than those of the published COMPASS results from the 2002 data. The final results from the 2002, 2003 and 2004 runs are compared with naive expectations and with existing model calculations.

QuarkdeuteronNuclear and High Energy PhysicsParticle physicsPhysics::Instrumentation and DetectorsSivers asymmetryHadrontransversity and Sivers functionFOS: Physical sciencesCOMPASS01 natural sciencesHigh Energy Physics - ExperimentNuclear physicsHigh Energy Physics - Experiment (hep-ex)nucleon structure; transverse spin and transverse momentum; transversity and Sivers functions; deuteron; COMPASS experimentCompass0103 physical sciencesCOMPASS experimentCollins010306 general physicsNuclear ExperimentCOMPASS experimenttransversityPhysicsLarge Hadron ColliderMuonSpectrometer010308 nuclear & particles physicsScatteringtransversity and Sivers functionsnucleon structureHigh Energy Physics::Experimenttransverse spin and transverse momentumasymmetryParticle Physics - Experimenttransverse single-spin asymmetry
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"Table 3" of "Cross section and longitudinal single-spin asymmetry $A_L$ for forward $W^{\pm}\rightarrow\mu^{\pm}\nu$ production in polarized $p$$+$$…

2023

Single-spin asymmetries at forward $A^{FW}_L$ and backward $A^{BW}_L$ rapidities for $p$+$p$ collisions at $\sqrt{s}$ = 510 GeV for results in 2013 and 2012, plus combined results for both years.

helicities$p$ $p$ --> $\mu^\pm$ + Xcross sectionsingle-spin asymmetry$p$ $p$ --> $W^\pm$ + Xppg214510.0
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"Conclusion" of "Cross section and longitudinal single-spin asymmetry $A_L$ for forward $W^{\pm}\rightarrow\mu^{\pm}\nu$ production in polarized $p$$…

2023

The total $W$ boson production cross sections for $p$+$p$ collisions at $\sqrt{s}$ = 510 GeV for $\sigma$($W^+$ $\rightarrow$ $\mu^+$) and $\sigma$($W^-$ $\rightarrow$ $\mu^-$).

helicities$p$ $p$ --> $\mu^\pm$ + Xcross sectionsingle-spin asymmetry$p$ $p$ --> $W^\pm$ + Xppg214510.0
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Nuclear Dependence of the Transverse-Single-Spin Asymmetry for Forward Neutron Production in Polarized p+A Collisions at √sNN = 200 GeV

2018

During 2015, the Relativistic Heavy Ion Collider (RHIC) provided collisions of transversely polarized protons with Au and Al nuclei for the first time, enabling the exploration of transverse-single-spin asymmetries with heavy nuclei. Large single-spin asymmetries in very forward neutron production have been previously observed in transversely polarized p + p collisions at RHIC, and the existing theoretical framework that was successful in describing the single-spin asymmetry in p + p collisions predicts only a moderate atomic-mass-number ( A ) dependence. In contrast, the asymmetries observed at RHIC in p + A collisions showed a surprisingly strong A dependence in inclusive forward neutron …

transverse-single-spin asymmetryheavy-ion collisionsNuclear Experimentforward neutron production
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