Measurement of Direct-Photon Cross Section and Double-Helicity Asymmetry at s =510 GeV in p → + p → Collisions

PHENIX Collaboration

doi:10.1103/PhysRevLett.130.251901

Measurement of Direct-Photon Cross Section and Double-Helicity Asymmetry at s =510 GeV in p → + p → Collisions

PHENIX Collaboration

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

11 Citations (Scopus)

Abstract

We present measurements of the cross section and double-helicity asymmetry ALL of direct-photon production in p→+p→ collisions at s=510 GeV. The measurements have been performed at midrapidity (|η|<0.25) with the PHENIX detector at the Relativistic Heavy Ion Collider. At relativistic energies, direct photons are dominantly produced from the initial quark-gluon hard scattering and do not interact via the strong force at leading order. Therefore, at s=510 GeV, where leading-order-effects dominate, these measurements provide clean and direct access to the gluon helicity in the polarized proton in the gluon-momentum-fraction range 0.02<x<0.08, with direct sensitivity to the sign of the gluon contribution.

Original language	English
Article number	251901
Journal	Physical review letters
Volume	130
Issue number	25
DOIs	https://doi.org/10.1103/PhysRevLett.130.251901
Publication status	Published - 2023 Jun 23

Bibliographical note

Publisher Copyright:
© 2023 authors. Published by the American Physical Society.

ASJC Scopus subject areas

General Physics and Astronomy

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10.1103/PhysRevLett.130.251901

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@article{33ee6e4be4e549e69324e8b3090a6881,

title = "Measurement of Direct-Photon Cross Section and Double-Helicity Asymmetry at s =510 GeV in p → + p → Collisions",

abstract = "We present measurements of the cross section and double-helicity asymmetry ALL of direct-photon production in p→+p→ collisions at s=510 GeV. The measurements have been performed at midrapidity (|η|<0.25) with the PHENIX detector at the Relativistic Heavy Ion Collider. At relativistic energies, direct photons are dominantly produced from the initial quark-gluon hard scattering and do not interact via the strong force at leading order. Therefore, at s=510 GeV, where leading-order-effects dominate, these measurements provide clean and direct access to the gluon helicity in the polarized proton in the gluon-momentum-fraction range 0.02",

author = "\{PHENIX Collaboration\} and Abdulameer, \{N. J.\} and U. Acharya and A. Adare and C. Aidala and Ajitanand, \{N. N.\} and Y. Akiba and R. Akimoto and M. Alfred and N. Apadula and Y. Aramaki and H. Asano and Atomssa, \{E. T.\} and Awes, \{T. C.\} and B. Azmoun and V. Babintsev and M. Bai and Bandara, \{N. S.\} and B. Bannier and Barish, \{K. N.\} and S. Bathe and A. Bazilevsky and M. Beaumier and S. Beckman and R. Belmont and A. Berdnikov and Y. Berdnikov and L. Bichon and D. Black and B. Blankenship and Bok, \{J. S.\} and V. Borisov and K. Boyle and Brooks, \{M. L.\} and J. Bryslawskyj and H. Buesching and V. Bumazhnov and S. Campbell and \{Canoa Roman\}, V. and Chen, \{C. H.\} and M. Chiu and Chi, \{C. Y.\} and Choi, \{I. J.\} and Choi, \{J. B.\} and T. Chujo and Z. Citron and M. Connors and R. Corliss and \{Corrales Morales\}, Y. and M. Csan{\'a}d and B. Hong",

note = "Publisher Copyright: {\textcopyright} 2023 authors. Published by the American Physical Society.",

year = "2023",

month = jun,

day = "23",

doi = "10.1103/PhysRevLett.130.251901",

language = "English",

volume = "130",

journal = "Physical review letters",

issn = "0031-9007",

publisher = "American Physical Society",

number = "25",

}

TY - JOUR

T1 - Measurement of Direct-Photon Cross Section and Double-Helicity Asymmetry at s =510 GeV in p → + p → Collisions

AU - PHENIX Collaboration

AU - Abdulameer, N. J.

AU - Acharya, U.

AU - Adare, A.

AU - Aidala, C.

AU - Ajitanand, N. N.

AU - Akiba, Y.

AU - Akimoto, R.

AU - Alfred, M.

AU - Apadula, N.

AU - Aramaki, Y.

AU - Asano, H.

AU - Atomssa, E. T.

AU - Awes, T. C.

AU - Azmoun, B.

AU - Babintsev, V.

AU - Bai, M.

AU - Bandara, N. S.

AU - Bannier, B.

AU - Barish, K. N.

AU - Bathe, S.

AU - Bazilevsky, A.

AU - Beaumier, M.

AU - Beckman, S.

AU - Belmont, R.

AU - Berdnikov, A.

AU - Berdnikov, Y.

AU - Bichon, L.

AU - Black, D.

AU - Blankenship, B.

AU - Bok, J. S.

AU - Borisov, V.

AU - Boyle, K.

AU - Brooks, M. L.

AU - Bryslawskyj, J.

AU - Buesching, H.

AU - Bumazhnov, V.

AU - Campbell, S.

AU - Canoa Roman, V.

AU - Chen, C. H.

AU - Chiu, M.

AU - Chi, C. Y.

AU - Choi, I. J.

AU - Choi, J. B.

AU - Chujo, T.

AU - Citron, Z.

AU - Connors, M.

AU - Corliss, R.

AU - Corrales Morales, Y.

AU - Csanád, M.

AU - Hong, B.

PY - 2023/6/23

Y1 - 2023/6/23

N2 - We present measurements of the cross section and double-helicity asymmetry ALL of direct-photon production in p→+p→ collisions at s=510 GeV. The measurements have been performed at midrapidity (|η|<0.25) with the PHENIX detector at the Relativistic Heavy Ion Collider. At relativistic energies, direct photons are dominantly produced from the initial quark-gluon hard scattering and do not interact via the strong force at leading order. Therefore, at s=510 GeV, where leading-order-effects dominate, these measurements provide clean and direct access to the gluon helicity in the polarized proton in the gluon-momentum-fraction range 0.02

AB - We present measurements of the cross section and double-helicity asymmetry ALL of direct-photon production in p→+p→ collisions at s=510 GeV. The measurements have been performed at midrapidity (|η|<0.25) with the PHENIX detector at the Relativistic Heavy Ion Collider. At relativistic energies, direct photons are dominantly produced from the initial quark-gluon hard scattering and do not interact via the strong force at leading order. Therefore, at s=510 GeV, where leading-order-effects dominate, these measurements provide clean and direct access to the gluon helicity in the polarized proton in the gluon-momentum-fraction range 0.02

UR - https://www.scopus.com/pages/publications/85164137210

U2 - 10.1103/PhysRevLett.130.251901

DO - 10.1103/PhysRevLett.130.251901

M3 - Article

C2 - 37418716

AN - SCOPUS:85164137210

SN - 0031-9007

VL - 130

JO - Physical review letters

JF - Physical review letters

IS - 25

M1 - 251901

ER -

Measurement of Direct-Photon Cross Section and Double-Helicity Asymmetry at s =510 GeV in p → + p → Collisions

Abstract

Bibliographical note

ASJC Scopus subject areas

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