Longitudinal Spin Transfer in Inclusive Λ and Λ⁻ Production in Polarized Proton-proton Collisions at √s =200 GeV

QH Xu; Lee Barnby; Thomas Burton; Leon Gaillard; Peter Jones; John Nelson; Anthony Timmins

doi:10.1063/1.2750813

Longitudinal Spin Transfer in Inclusive Λ and Λ⁻ Production in Polarized Proton-proton Collisions at √s =200 GeV

QH Xu, Lee Barnby, Thomas Burton, Leon Gaillard, Peter Jones, John Nelson, Anthony Timmins

Physics and Astronomy

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

3 Citations (Scopus)

Abstract

This contribution reports on a proof-of-principle measurement of the longitudinal spin transfer D^ in inclusive A and A production in polarized proton-proton collisions at a center of mass energy y/s = 200 GeV. The data sample consists of about 3 x 106 minimum bias events collected in the year 2005 by the STAR experiment at RHIC with proton beam polarizations of up to 50%. The A(A) candidates are reconstructed at mid-rapidity (\r\\ < 1) using the STAR Time Projection Chamber via the dominant decay channel A —> pn ~ (A —>• pn+). Their mean transverse momentum pT is about 1.3 GeV/c and longitudinal momentum fractionxp = 7.5 x 10~3. The longitudinal A(A) polarization is determined using a method in which the detector acceptance mostly cancels.

Original language	English
Title of host publication	AIP Conference Proceedings
Publisher	AIP Publishing
Pages	428-431
Number of pages	4
Volume	915
ISBN (Print)	978-0-7354-0423-6
DOIs	https://doi.org/10.1063/1.2750813
Publication status	E-pub ahead of print - 1 Jun 2007
Event	17th International Spin Physics Symposium - Duration: 2 Oct 2006 → 7 Oct 2006

Conference

Conference	17th International Spin Physics Symposium
Period	2/10/06 → 7/10/06

Keywords

Spin transfer
Lambda polarization

Access to Document

10.1063/1.2750813Licence: None: All rights reserved

http://aip.scitation.org/doi/abs/10.1063/1.2750813Licence: None: All rights reserved

Cite this

@inproceedings{0d5d6407f85d44688014eabc8b05a71d,

title = "Longitudinal Spin Transfer in Inclusive Λ and Λ⁻ Production in Polarized Proton-proton Collisions at √s =200 GeV",

abstract = "This contribution reports on a proof-of-principle measurement of the longitudinal spin transfer D^ in inclusive A and A production in polarized proton-proton collisions at a center of mass energy y/s = 200 GeV. The data sample consists of about 3 x 106 minimum bias events collected in the year 2005 by the STAR experiment at RHIC with proton beam polarizations of up to 50%. The A(A) candidates are reconstructed at mid-rapidity (\r\\ < 1) using the STAR Time Projection Chamber via the dominant decay channel A —> pn ~ (A —>• pn+). Their mean transverse momentum pT is about 1.3 GeV/c and longitudinal momentum fractionxp = 7.5 x 10~3. The longitudinal A(A) polarization is determined using a method in which the detector acceptance mostly cancels. ",

keywords = "Spin transfer, Lambda polarization ",

author = "QH Xu and Lee Barnby and Thomas Burton and Leon Gaillard and Peter Jones and John Nelson and Anthony Timmins",

year = "2007",

month = jun,

day = "1",

doi = "10.1063/1.2750813",

language = "English",

isbn = "978-0-7354-0423-6",

volume = "915",

pages = "428--431",

booktitle = "AIP Conference Proceedings",

publisher = "AIP Publishing",

address = "United States",

note = "17th International Spin Physics Symposium ; Conference date: 02-10-2006 Through 07-10-2006",

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TY - GEN

T1 - Longitudinal Spin Transfer in Inclusive Λ and Λ⁻ Production in Polarized Proton-proton Collisions at √s =200 GeV

AU - Xu, QH

AU - Barnby, Lee

AU - Burton, Thomas

AU - Gaillard, Leon

AU - Jones, Peter

AU - Nelson, John

AU - Timmins, Anthony

PY - 2007/6/1

Y1 - 2007/6/1

N2 - This contribution reports on a proof-of-principle measurement of the longitudinal spin transfer D^ in inclusive A and A production in polarized proton-proton collisions at a center of mass energy y/s = 200 GeV. The data sample consists of about 3 x 106 minimum bias events collected in the year 2005 by the STAR experiment at RHIC with proton beam polarizations of up to 50%. The A(A) candidates are reconstructed at mid-rapidity (\r\\ < 1) using the STAR Time Projection Chamber via the dominant decay channel A —> pn ~ (A —>• pn+). Their mean transverse momentum pT is about 1.3 GeV/c and longitudinal momentum fractionxp = 7.5 x 10~3. The longitudinal A(A) polarization is determined using a method in which the detector acceptance mostly cancels.

AB - This contribution reports on a proof-of-principle measurement of the longitudinal spin transfer D^ in inclusive A and A production in polarized proton-proton collisions at a center of mass energy y/s = 200 GeV. The data sample consists of about 3 x 106 minimum bias events collected in the year 2005 by the STAR experiment at RHIC with proton beam polarizations of up to 50%. The A(A) candidates are reconstructed at mid-rapidity (\r\\ < 1) using the STAR Time Projection Chamber via the dominant decay channel A —> pn ~ (A —>• pn+). Their mean transverse momentum pT is about 1.3 GeV/c and longitudinal momentum fractionxp = 7.5 x 10~3. The longitudinal A(A) polarization is determined using a method in which the detector acceptance mostly cancels.

KW - Spin transfer

KW - Lambda polarization

U2 - 10.1063/1.2750813

DO - 10.1063/1.2750813

M3 - Conference contribution

SN - 978-0-7354-0423-6

VL - 915

SP - 428

EP - 431

BT - AIP Conference Proceedings

PB - AIP Publishing

T2 - 17th International Spin Physics Symposium

Y2 - 2 October 2006 through 7 October 2006

ER -