Measurement of e+e- Momentum and Angular Distributions from Linearly Polarized Photon Collisions

被引：105

作者：

Adam, J. ^{[6
]}

Adamczyk, L. ^{[2
]}

Adams, J. R. ^{[39
]}

Adkins, J. K. ^{[30
]}

Agakishiev, G. ^{[28
]}

Aggarwal, M. M. ^{[40
]}

Ahammed, Z. ^{[59
]}

Alekseev, I ^{[3
,35
]}

Anderson, D. M. ^{[53
]}

Aparin, A. ^{[28
]}

Aschenauer, E. C. ^{[6
]}

Ashraf, M. U. ^{[11
]}

Atetalla, F. G. ^{[29
]}

Attri, A. ^{[40
]}

Averichev, G. S. ^{[28
]}

Bairathi, V ^{[22
]}

Barish, K. ^{[10
]}

Behera, A. ^{[51
]}

Bellwied, R. ^{[20
]}

Bhasin, A. ^{[27
]}

Bielcik, J. ^{[14
]}

Bielcikova, J. ^{[38
]}

Bland, L. C. ^{[6
]}

Bordyuzhin, I. G. ^{[3
]}

Brandenburg, J. D. ^{[6
,48
]}

Brandin, A., V ^{[35
]}

Butterworth, J. ^{[44
]}

Caines, H. ^{[62
]}

Calderon de la Barca Sanchez, M. ^{[8
]}

Cebra, D. ^{[8
]}

Chakaberia, I ^{[6
,29
]}

Chaloupka, P. ^{[14
]}

Chan, B. K. ^{[9
]}

Chang, F-H ^{[37
]}

Chang, Z. ^{[6
]}

Chankova-Bunzarova, N. ^{[28
]}

Chatterjee, A. ^{[11
]}

Chen, D. ^{[10
]}

Chen, J. H. ^{[18
]}

Chen, X. ^{[47
]}

Chen, Z. ^{[48
]}

Cheng, J. ^{[55
]}

Cherney, M. ^{[13
]}

Chevalier, M. ^{[10
]}

Choudhury, S. ^{[18
]}

Christie, W. ^{[6
]}

Crawford, H. J. ^{[7
]}

Csanad, M. ^{[16
]}

Daugherity, M. ^{[1
]}

Dedovich, T. G. ^{[28
]}

机构：

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

[2] AGH Univ Sci & Technol, FPACS, PL-30059 Krakow, Poland

[3] Kurchatov Inst, Alikhanov Inst Theoret & Expt Phys NRC, Moscow 117218, Russia

[4] Argonne Natl Lab, 9700 S Cass Ave, Argonne, IL 60439 USA

[5] Amer Univ Cairo, New Cairo 11835, Egypt

[6] Brookhaven Natl Lab, Upton, NY 11973 USA

[7] Univ Calif Berkeley, Berkeley, CA 94720 USA

[8] Univ Calif Davis, Davis, CA 95616 USA

[9] Univ Calif Los Angeles, Los Angeles, CA 90095 USA

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

[11] Cent China Normal Univ, Wuhan 430079, Hubei, Peoples R China

[12] Univ Illinois, Chicago, IL 60607 USA

[13] Creighton Univ, Omaha, NE 68178 USA

[14] Czech Tech Univ, FNSPE, Prague 11519, Czech Republic

[15] Tech Univ Darmstadt, D-64289 Darmstadt, Germany

[16] Eotvos Lorand Univ, H-1117 Budapest, Hungary

[17] Frankfurt Inst Adv Studies FIAS, D-60438 Frankfurt, Germany

[18] Fudan Univ, Shanghai 200433, Peoples R China

[19] Heidelberg Univ, D-69120 Heidelberg, Germany

[20] Univ Houston, Houston, TX 77204 USA

[21] Huzhou Univ, Huzhou 313000, Zhejiang, Peoples R China

[22] Indian Inst Sci Educ & Res IISER, Berhampur 760010, India

[23] Indian Inst Sci Educ & Res IISER Tirupati, Tirupati 517507, Andhra Pradesh, India

[24] Indian Inst Technol, Patna 801106, Bihar, India

[25] Indiana Univ, Bloomington, IN 47408 USA

[26] Chinese Acad Sci, Inst Modern Phys, Lanzhou 730000, Gansu, Peoples R China

[27] Univ Jammu, Jammu 180001, India

[28] Joint Inst Nucl Res, Dubna 141980, Russia

[29] Kent State Univ, Kent, OH 44242 USA

[30] Univ Kentucky, Lexington, KY 40506 USA

[31] Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA

[32] Lehigh Univ, Bethlehem, PA 18015 USA

[33] Max Planck Inst Phys & Astrophys, D-80805 Munich, Germany

[34] Michigan State Univ, E Lansing, MI 48824 USA

[35] Natl Res Nucl Univ MEPhI, Moscow 115409, Russia

[36] HBNI, Natl Inst Sci Educ & Res, Jatni 752050, India

[37] Natl Cheng Kung Univ, Tainan 70101, Taiwan

[38] CAS, Nucl Phys Inst, Rez 25068, Czech Republic

[39] Ohio State Univ, Columbus, OH 43210 USA

[40] Panjab Univ, Chandigarh 160014, India

[41] Penn State Univ, University Pk, PA 16802 USA

[42] NRC Kurchatov Inst, Inst High Energy Phys, Protvino 142281, Russia

[43] Purdue Univ, W Lafayette, IN 47907 USA

[44] Rice Univ, Houston, TX 77251 USA

[45] Rutgers State Univ, Piscataway, NJ 08854 USA

[46] Univ Sao Paulo, BR-05314970 Sao Paulo, Brazil

[47] Univ Sci & Technol China, Hefei 230026, Anhui, Peoples R China

[48] Shandong Univ, Qingdao 266237, Shandong, Peoples R China

[49] Chinese Acad Sci, Shanghai Inst Appl Phys, Shanghai 201800, Peoples R China

[50] Southern Connecticut State Univ, New Haven, CT 06515 USA

来源：

PHYSICAL REVIEW LETTERS | 2021年 / 127卷 / 05期

基金：

中国国家自然科学基金; 新加坡国家研究基金会; 美国国家科学基金会;

关键词：

POSITRON PAIR PRODUCTION; HEAVY-ION COLLISIONS; PB-PB COLLISIONS; VACUUM BIREFRINGENCE; SCATTERING; PARTICLES; RADIATION; SPECTRA;

D O I：

10.1103/PhysRevLett.127.052302

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The Breit-Wheeler process which produces matter and antimatter from photon collisions is experimentally investigated through the observation of 6085 exclusive electron-positron pairs in ultraperipheral Au + Au collisions at root s(NN) = 200 GeV. The measurements reveal a large fourth-order angular modulation of cos4 Delta phi = (16.8 +/- 2.5)% and smooth invariant mass distribution absent of vector mesons (phi, omega, and rho) at the experimental limit of <= 0.2% of the observed yields. The differential cross section as a function of e(+)e(-) pair transverse momentum P-perpendicular to peaks at low value with root < P-perpendicular to(2)> = 38.1 +/- 0.9 MeV and displays a significant centrality dependence. These features are consistent with QED calculations for the collision of linearly polarized photons quantized from the extremely strong electromagnetic fields generated by the highly charged Au nuclei at ultrarelativistic speed. The experimental results have implications for vacuum birefringence and for mapping the magnetic field which is important for emergent QCD phenomena.

引用

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