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

Authors

J. Adam, Brookhaven National Laboratory
L. Adamczyk, AGH University of Science and Technology
J. R. Adams, The Ohio State University
J. K. Adkins, University of Kentucky
G. Agakishiev, Joint Institute for Nuclear Research, Dubna
M. M. Aggarwal, Panjab University
Z. Ahammed, Variable Energy Cyclotron Centre India
I. Alekseev, Alikhanov Institute for Theoretical and Experimental Physics
D. M. Anderson, Texas A&M University
A. Aparin, Joint Institute for Nuclear Research, Dubna
E. C. Aschenauer, Brookhaven National Laboratory
M. U. Ashraf, Huazhong Normal University
F. G. Atetalla, Kent State University
A. Attri, Panjab University
G. S. Averichev, Joint Institute for Nuclear Research, Dubna
V. Bairathi, Indian Institute of Science Education and Research Berhampur
K. Barish, University of California, Riverside
A. Behera, Stony Brook University
R. Bellwied, University of Houston
A. Bhasin, University of Jammu
J. Bielcik, Czech Technical University in Prague
J. Bielcikova, Nuclear Physics Institute of the Academy of Sciences of the Czech Republic v. v. i.
L. C. Bland, Brookhaven National Laboratory
I. G. Bordyuzhin, Alikhanov Institute for Theoretical and Experimental Physics
J. D. Brandenburg, Brookhaven National Laboratory
A. V. Brandin, National Research Nuclear University MEPhI
J. Butterworth, Rice University
H. Caines, Yale University
M. Calderón De La Barca Sánchez, University of California, Davis

Funding Sponsor

National Science Foundation

Find in your Library

https://doi.org/10.1103/PhysRevLett.127.052302

Document Type

Research Article

Publication Title

Physical Review Letters

Publication Date

7-30-2021

doi

10.1103/PhysRevLett.127.052302

Abstract

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 sNN=200 GeV. The measurements reveal a large fourth-order angular modulation of cos4Δφ=(16.8±2.5)% and smooth invariant mass distribution absent of vector mesons (φ, ω, and ρ) 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⊥ peaks at low value with ⟨P⊥2

Recommended Citation

APA Citation

Adam, J. Adamczyk, L. Adams, J. Adkins, J. ... (2021). Measurement of e+e- Momentum and Angular Distributions from Linearly Polarized Photon Collisions. Physical Review Letters, 127(5), https://doi.org/10.1103/PhysRevLett.127.052302

MLA Citation

Adam, J., et al. "Measurement of e+e- Momentum and Angular Distributions from Linearly Polarized Photon Collisions." Physical Review Letters, vol. 127, no. 5, 2021
https://doi.org/10.1103/PhysRevLett.127.052302