@article{6d86f9d865ab4e9fa7a88fdd1e7633c6,
title = "Measurement of e+e- Momentum and Angular Distributions from Linearly Polarized Photon Collisions",
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.",
author = "\{(STAR Collaboration)\} and J. Adam and L. Adamczyk and Adams, \{J. R.\} and Adkins, \{J. K.\} and G. Agakishiev and Aggarwal, \{M. M.\} and Z. Ahammed and I. Alekseev and Anderson, \{D. M.\} and A. Aparin and Aschenauer, \{E. C.\} and Ashraf, \{M. U.\} and Atetalla, \{F. G.\} and A. Attri and Averichev, \{G. S.\} and V. Bairathi and K. Barish and A. Behera and R. Bellwied and A. Bhasin and J. Bielcik and J. Bielcikova and Bland, \{L. C.\} and Bordyuzhin, \{I. G.\} and Brandenburg, \{J. D.\} and Brandin, \{A. V.\} and J. Butterworth and H. Caines and \{Calder{\'o}n De La Barca S{\'a}nchez\}, M. and D. Cebra and I. Chakaberia and P. Chaloupka and Chan, \{B. K.\} and Chang, \{F. H.\} and Z. Chang and N. Chankova-Bunzarova and A. Chatterjee and D. Chen and Chen, \{J. H.\} and X. Chen and Z. Chen and J. Cheng and M. Cherney and M. Chevalier and S. Choudhury and W. Christie and Crawford, \{H. J.\} and R. Esha and J. Jia and R. Lacey",
note = "Publisher Copyright: {\textcopyright}=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.",
year = "2021",
month = jul,
day = "30",
doi = "10.1103/PhysRevLett.127.052302",
language = "English",
volume = "127",
journal = "Physical Review Letters",
issn = "0031-9007",
number = "5",
}