Measurement of e(+)e(-) Momentum and Angular Distributions from Linearly Polarized Photon Collisions
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389005%3A_____%2F21%3A00544731" target="_blank" >RIV/61389005:_____/21:00544731 - isvavai.cz</a>
Alternative codes found
RIV/68407700:21340/21:00351246
Result on the web
<a href="https://doi.org/10.1103/PhysRevLett.127.052302" target="_blank" >https://doi.org/10.1103/PhysRevLett.127.052302</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1103/PhysRevLett.127.052302" target="_blank" >10.1103/PhysRevLett.127.052302</a>
Alternative languages
Result language
angličtina
Original language name
Measurement of e(+)e(-) Momentum and Angular Distributions from Linearly Polarized Photon Collisions
Original language description
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.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
—
OECD FORD branch
10304 - Nuclear physics
Result continuities
Project
Result was created during the realization of more than one project. More information in the Projects tab.
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2021
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Physical Review Letters
ISSN
0031-9007
e-ISSN
1079-7114
Volume of the periodical
127
Issue of the periodical within the volume
5
Country of publishing house
US - UNITED STATES
Number of pages
9
Pages from-to
052302
UT code for WoS article
000679181800007
EID of the result in the Scopus database
2-s2.0-85112679069