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

被引：5

作者：

Abdulameer, N. J. ^{[14
]}

Acharya, U. ^{[19
]}

Adare, A. ^{[11
]}

Aidala, C. ^{[42
]}

Ajitanand, N. N. ^{[61
]}

Akiba, Y. ^{[56
,57
]}

Akimoto, R. ^{[10
]}

Alfred, M. ^{[22
]}

Apadula, N. ^{[27
,62
]}

Aramaki, Y. ^{[56
]}

Asano, H. ^{[34
,56
]}

Atomssa, E. T. ^{[62
]}

Awes, T. C. ^{[52
]}

Azmoun, B.

Babintsev, V. ^{[23
]}

Bai, M. ^{[6
]}

Bandara, N. S. ^{[40
]}

Bannier, B. ^{[62
]}

Barish, K. N.

Bathe, S. ^{[5
,57
]}

Bazilevsky, A. ^{[7
]}

Beaumier, M. ^{[8
]}

Beckman, S. ^{[11
]}

Belmont, R. ^{[11
,50
]}

Berdnikov, A. ^{[59
]}

Berdnikov, Y. ^{[59
]}

Bichon, L. ^{[67
]}

Black, D. ^{[8
]}

Blankenship, B. ^{[67
]}

Bok, J. S. ^{[49
]}

Borisov, V. ^{[59
]}

Boyle, K. ^{[57
]}

Brooks, M. L. ^{[37
]}

Bryslawskyj, J. ^{[5
,8
]}

Buesching, H. ^{[7
]}

Bumazhnov, V. ^{[23
]}

Campbell, S. ^{[12
,27
]}

Roman, V. Canoa ^{[62
]}

Chen, C. -H. ^{[57
]}

Chiu, M. ^{[7
]}

Chi, C. Y. ^{[12
]}

Choi, I. J. ^{[24
]}

Choi, J. B. ^{[29
]}

Chujo, T. ^{[66
]}

Citron, Z. ^{[68
]}

Connors, M. ^{[19
]}

Corliss, R. ^{[62
]}

Morales, Y. Corrales ^{[37
]}

Csanad, M. ^{[15
]}

Csorgo, T. ^{[41
,69
]}

机构：

[1] Abilene Christian Univ, Abilene, TX 79699 USA

[2] Augustana Univ, Dept Phys, Sioux Falls, SD 57197 USA

[3] Banaras Hindu Univ, Dept Phys, Varanasi 221005, Uttar Pradesh, India

[4] Bhabha Atom Res Ctr, Bombay 400085, Maharashtra, India

[5] City Univ New York, Baruch Coll, New York, NY 10010 USA

[6] Brookhaven Natl Lab, Collider Accelerator Dept, Upton, NY 11973 USA

[7] Brookhaven Natl Lab, Phys Dept, Upton, NY 11973 USA

[8] Univ Calif Riverside, Riverside, CA 92521 USA

[9] Charles Univ Prague, Fac Math & Phys, Prague 18000, Czech Republic

[10] Univ Tokyo, Grad Sch Sci, Ctr Nucl Study, 7-3-1 Hongo,Bunkyo, Tokyo 1130033, Japan

[11] Univ Colorado, Boulder, CO 80309 USA

[12] Columbia Univ, New York, NY 10027 USA

[13] Czech Tech Univ, Zikova 4, Prague 16636 6, Czech Republic

[14] Debrecen Univ, Egyet Ter 1, H-4010 Debrecen, Hungary

[15] Eotvos Lorand Univ, ELTE, Pazmany P s 1-A, H-1117 Budapest, Hungary

[16] Ewha Womans Univ, Seoul 120750, South Korea

[17] Florida A&M Univ, Tallahassee, FL 32307 USA

[18] Florida State Univ, Tallahassee, FL 32306 USA

[19] Georgia State Univ, Atlanta, GA 30303 USA

[20] Hanyang Univ, Seoul 133792, South Korea

[21] Hiroshima Univ, Higashihiroshima 7398526, Japan

[22] Howard Univ, Dept Phys & Astron, Washington, DC USA

[23] IHEP Protvino, State Res Ctr Russian Federat, Inst High Energy Phys, Protvino 142281, Russia

[24] Univ Illinois, Urbana, IL 61801 USA

[25] Russian Acad Sci, Inst Nucl Res, Prospekt 60 letiya Oktyabrya 7a, Moscow 117312, Russia

[26] Acad Sci Czech Republic, Inst Phys, Slovance 2, Prague 18221 8, Czech Republic

[27] Iowa State Univ, Ames, IA 50011 USA

[28] Japan Atom Energy Agcy, Adv Sci Res Ctr, 2-4 Shirakata Shirane, Tokai, Ibaraki 3191195, Japan

[29] Jeonbuk Natl Univ, Jeonju 54896, South Korea

[30] Helsinki Inst Phys, POB 35, FI-40014 Jyvaskyla, Finland

[31] KEK, High Energy Accelerator Res Org, Tsukuba, Ibaraki 3050801, Japan

[32] Korea Univ, Seoul 02841, South Korea

[33] Natl Res Ctr Kurchatov Inst, Moscow 123098, Russia

[34] Kyoto Univ, Kyoto 6068502, Japan

[35] Lahore Univ Management Sci, Phys Dept, Lahore 54792, Pakistan

[36] Lawrence Livermore Natl Lab, Livermore, CA 94550 USA

[37] Los Alamos Natl Lab, Los Alamos, NM 87545 USA

[38] Lund Univ, Dept Phys, POB 118, SE-22100 Lund, Sweden

[39] Univ Maryland, College Pk, MD 20742 USA

[40] Univ Massachusetts, Dept Phys, Amherst, MA 01003 USA

[41] Lab Femtoscopy, MATE, Karoly Robert Campus, H-36 Matraiut, Hungary

[42] Univ Michigan, Dept Phys, Ann Arbor, MI 48109 USA

[43] Mississippi State Univ, Mississippi State, MS 39762 USA

[44] Muhlenberg Coll, Allentown, PA 18104 USA

[45] Myongji Univ, Yongin 449728, Kyonggido, South Korea

[46] Nara Womens Univ, Kita Uoya Nishi Machi, Nara 6308506, Japan

[47] Natl Res Nucl Univ, Moscow Engn Phys Inst, MEPhI, Moscow 115409, Russia

[48] Univ New Mexico, Albuquerque, NM 87131 USA

[49] New Mexico State Univ, Las Cruces, NM 88003 USA

[50] Univ North Carolina Greensboro, Phys & Astron Dept, Greensboro, NC 27412 USA

来源：

PHYSICAL REVIEW LETTERS | 2023年 / 130卷 / 25期

基金：

美国国家科学基金会; 日本学术振兴会; 以色列科学基金会;

关键词：

PROTON; SCATTERING; DEUTERON; DETECTOR;

D O I：

10.1103/PhysRevLett.130.251901

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We present measurements of the cross section and double-helicity asymmetry ALL of direct-photon production in p ⃗ + p ⃗ collisions at ffis ffi p = 510 GeV. The measurements have been performed at midrapidity (I & eta;I < 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 ffiffistrong force at leading order. Therefore, at p 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.

引用

页数：8

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