J/psi polarization in pp collisions at sqrt(s)=7 TeV

ALICE Collaboration

doi:10.1103/PhysRevLett.108.082001

J/psi polarization in pp collisions at sqrt(s)=7 TeV

ALICE Collaboration

Physics and Astronomy

Research output: Contribution to journal › Article › peer-review

100 Citations (Scopus)

Abstract

The ALICE Collaboration has studied J/ψ production in pp collisions at √s=7 TeV at the LHC through its muon pair decay. The polar and azimuthal angle distributions of the decay muons were measured, and results on the J/ψ polarization parameters λ_θ and λ_ϕ were obtained. The study was performed in the kinematic region 2.5<y<4, 2<pt<8 GeV/c, in the helicity and Collins-Soper reference frames. In both frames, the polarization parameters are compatible with zero, within uncertainties.

Original language	English
Article number	082001
Journal	Physical Review Letters
Volume	108
Issue number	8
DOIs	https://doi.org/10.1103/PhysRevLett.108.082001
Publication status	Published - 23 Feb 2012

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10.1103/PhysRevLett.108.082001Licence: Creative Commons: Attribution (CC BY)

Birmingham Nuclear Physics Consolidated Grant
Freer, M., Evans, P., Jones, P., Wheldon, C. & Lazzeroni, C.
SCIENCE & TECHNOLOGY FACILITIES COUNCIL
1/08/11 → 31/07/14
Project: Research Councils

Cite this

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title = "J/psi polarization in pp collisions at sqrt(s)=7 TeV",

abstract = "The ALICE Collaboration has studied J/ψ production in pp collisions at √s=7 TeV at the LHC through its muon pair decay. The polar and azimuthal angle distributions of the decay muons were measured, and results on the J/ψ polarization parameters λ_θ and λ_ϕ were obtained. The study was performed in the kinematic region 2.5<y<4, 2<pt<8 GeV/c, in the helicity and Collins-Soper reference frames. In both frames, the polarization parameters are compatible with zero, within uncertainties.",

author = "{ALICE Collaboration} and Lee Barnby and David Evans and Luke Hanratty and Peter Jones and P Jovanovic and Anton Jusko and Ravjeet Kour and Marian Krivda and Cristina Lazzeroni and Roman Lietava and Zoe Matthews and Sparsh Navin and Arvinder Palaha and Plamen Petrov and R Platt and Patrick Scott and {Tudor Jones}, Goronwy and {Villalobos Baillie}, Orlando",

year = "2012",

month = feb,

day = "23",

doi = "10.1103/PhysRevLett.108.082001",

language = "English",

volume = "108",

journal = "Physical Review Letters",

issn = "0031-9007",

publisher = "American Physical Society (APS)",

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TY - JOUR

T1 - J/psi polarization in pp collisions at sqrt(s)=7 TeV

AU - ALICE Collaboration

AU - Barnby, Lee

AU - Evans, David

AU - Hanratty, Luke

AU - Jones, Peter

AU - Jovanovic, P

AU - Jusko, Anton

AU - Kour, Ravjeet

AU - Krivda, Marian

AU - Lazzeroni, Cristina

AU - Lietava, Roman

AU - Matthews, Zoe

AU - Navin, Sparsh

AU - Palaha, Arvinder

AU - Petrov, Plamen

AU - Platt, R

AU - Scott, Patrick

AU - Tudor Jones, Goronwy

AU - Villalobos Baillie, Orlando

PY - 2012/2/23

Y1 - 2012/2/23

N2 - The ALICE Collaboration has studied J/ψ production in pp collisions at √s=7 TeV at the LHC through its muon pair decay. The polar and azimuthal angle distributions of the decay muons were measured, and results on the J/ψ polarization parameters λ_θ and λ_ϕ were obtained. The study was performed in the kinematic region 2.5<y<4, 2<pt<8 GeV/c, in the helicity and Collins-Soper reference frames. In both frames, the polarization parameters are compatible with zero, within uncertainties.

AB - The ALICE Collaboration has studied J/ψ production in pp collisions at √s=7 TeV at the LHC through its muon pair decay. The polar and azimuthal angle distributions of the decay muons were measured, and results on the J/ψ polarization parameters λ_θ and λ_ϕ were obtained. The study was performed in the kinematic region 2.5<y<4, 2<pt<8 GeV/c, in the helicity and Collins-Soper reference frames. In both frames, the polarization parameters are compatible with zero, within uncertainties.

U2 - 10.1103/PhysRevLett.108.082001

DO - 10.1103/PhysRevLett.108.082001

M3 - Article

SN - 0031-9007

VL - 108

JO - Physical Review Letters

JF - Physical Review Letters

IS - 8

M1 - 082001

ER -

J/psi polarization in pp collisions at sqrt(s)=7 TeV

Abstract

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Birmingham Nuclear Physics Consolidated Grant

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