Measurement of transverse spin effects with the forward pion detector at STAR in polarized p+p collisions at 200GeV

Steven Heppelmann

doi:10.3360/dis.2007.97

Measurement of transverse spin effects with the forward pion detector at STAR in polarized p+p collisions at 200GeV

Steven Heppelmann

Physics

Research output: Contribution to conference › Paper › peer-review

1 Scopus citations

Abstract

The STAR collaboration presents preliminary measurements of A_N, the transverse single spin asymmetries in p + p → π⁰ + X interactions at √s = 200GeV/c with rapidity in the range from 3.3 to 3.7. The data were collected with the STAR FPD and FPD++ detectors during RHIC Run 6. With this much larger data set than that of earlier RHIC runs, a determination of the transverse momentum (p_T) dependence of A_N for narrow bins of the Feynman X_F out to p_T > 3GeV/c is presented. While all the current theories predict that the asymmetry at fixed X_F should fall with p_T, this experimental measurement shows no reduction in asymmetry as a function of p_T. These asymmetries correspond to production in a regime where NLO PQCD calculations can successfully describe the spin summed cross sections.

Original language	English (US)
DOIs	https://doi.org/10.3360/dis.2007.97
State	Published - 2007
Event	15th International Workshop on Deep-Inelastic Scattering and Related Subjects, DIS 2007 - Munich, Germany Duration: Apr 16 2007 → Apr 20 2007

Other

Other	15th International Workshop on Deep-Inelastic Scattering and Related Subjects, DIS 2007
Country/Territory	Germany
City	Munich
Period	4/16/07 → 4/20/07

All Science Journal Classification (ASJC) codes

Radiation

Access to Document

10.3360/dis.2007.97

Cite this

@conference{c5fe2bf610a34b6b96ae682a311a5f2b,

title = "Measurement of transverse spin effects with the forward pion detector at STAR in polarized p+p collisions at 200GeV",

abstract = "The STAR collaboration presents preliminary measurements of AN, the transverse single spin asymmetries in p + p → π0 + X interactions at √s = 200GeV/c with rapidity in the range from 3.3 to 3.7. The data were collected with the STAR FPD and FPD++ detectors during RHIC Run 6. With this much larger data set than that of earlier RHIC runs, a determination of the transverse momentum (pT) dependence of AN for narrow bins of the Feynman XF out to pT > 3GeV/c is presented. While all the current theories predict that the asymmetry at fixed XF should fall with pT, this experimental measurement shows no reduction in asymmetry as a function of pT. These asymmetries correspond to production in a regime where NLO PQCD calculations can successfully describe the spin summed cross sections.",

author = "Steven Heppelmann",

year = "2007",

doi = "10.3360/dis.2007.97",

language = "English (US)",

note = "15th International Workshop on Deep-Inelastic Scattering and Related Subjects, DIS 2007 ; Conference date: 16-04-2007 Through 20-04-2007",

}

TY - CONF

T1 - Measurement of transverse spin effects with the forward pion detector at STAR in polarized p+p collisions at 200GeV

AU - Heppelmann, Steven

PY - 2007

Y1 - 2007

N2 - The STAR collaboration presents preliminary measurements of AN, the transverse single spin asymmetries in p + p → π0 + X interactions at √s = 200GeV/c with rapidity in the range from 3.3 to 3.7. The data were collected with the STAR FPD and FPD++ detectors during RHIC Run 6. With this much larger data set than that of earlier RHIC runs, a determination of the transverse momentum (pT) dependence of AN for narrow bins of the Feynman XF out to pT > 3GeV/c is presented. While all the current theories predict that the asymmetry at fixed XF should fall with pT, this experimental measurement shows no reduction in asymmetry as a function of pT. These asymmetries correspond to production in a regime where NLO PQCD calculations can successfully describe the spin summed cross sections.

AB - The STAR collaboration presents preliminary measurements of AN, the transverse single spin asymmetries in p + p → π0 + X interactions at √s = 200GeV/c with rapidity in the range from 3.3 to 3.7. The data were collected with the STAR FPD and FPD++ detectors during RHIC Run 6. With this much larger data set than that of earlier RHIC runs, a determination of the transverse momentum (pT) dependence of AN for narrow bins of the Feynman XF out to pT > 3GeV/c is presented. While all the current theories predict that the asymmetry at fixed XF should fall with pT, this experimental measurement shows no reduction in asymmetry as a function of pT. These asymmetries correspond to production in a regime where NLO PQCD calculations can successfully describe the spin summed cross sections.

UR - http://www.scopus.com/inward/record.url?scp=85085404205&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85085404205&partnerID=8YFLogxK

U2 - 10.3360/dis.2007.97

DO - 10.3360/dis.2007.97

M3 - Paper

AN - SCOPUS:85085404205

T2 - 15th International Workshop on Deep-Inelastic Scattering and Related Subjects, DIS 2007

Y2 - 16 April 2007 through 20 April 2007

ER -

Measurement of transverse spin effects with the forward pion detector at STAR in polarized p+p collisions at 200GeV

Abstract

Other

All Science Journal Classification (ASJC) codes

Access to Document

Other files and links

Fingerprint

Cite this