TY - JOUR
T1 - Soft Photon Theorem in QCD with Massless Quarks
AU - Ma, Yao
AU - Sterman, George
AU - Venkata, Aniruddha
N1 - Publisher Copyright: © 2024 authors. Published by the American Physical Society. Published by the American Physical Society under the terms of the "https://creativecommons.org/licenses/by/4.0/"Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI. Funded by SCOAP3.
PY - 2024/3/1
Y1 - 2024/3/1
N2 - Working to all orders in dimensionally regularized QCD with massless quarks, we study the radiation of a photon whose energy is much lower than that of external partons. The conventional soft photon theorem receives corrections at leading power in the photon energy, associated with soft virtual loops of massless fermions. These additive corrections give an overall factor times the nonradiative amplitude that is infrared finite and real to all orders in αs. Based on recent calculations of the three-loop soft gluon current, we identify the lowest-order three-loop correction.
AB - Working to all orders in dimensionally regularized QCD with massless quarks, we study the radiation of a photon whose energy is much lower than that of external partons. The conventional soft photon theorem receives corrections at leading power in the photon energy, associated with soft virtual loops of massless fermions. These additive corrections give an overall factor times the nonradiative amplitude that is infrared finite and real to all orders in αs. Based on recent calculations of the three-loop soft gluon current, we identify the lowest-order three-loop correction.
UR - https://www.scopus.com/pages/publications/85186264673
U2 - 10.1103/PhysRevLett.132.091902
DO - 10.1103/PhysRevLett.132.091902
M3 - Article
C2 - 38489618
SN - 0031-9007
VL - 132
JO - Physical Review Letters
JF - Physical Review Letters
IS - 9
M1 - 091902
ER -