Next-to-soft radiation from a different angle

Melissa Van Beekveld; Abhinava Danish; Eric Laenen; Sourav Pal; Anurag Tripathi; Chris D. White

doi:10.1103/PhysRevD.109.074005

Next-to-soft radiation from a different angle

Melissa Van Beekveld, Abhinava Danish, Eric Laenen, Sourav Pal, Anurag Tripathi, Chris D. White

Research output: Contribution to journal › Article › Academic › peer-review

Abstract

Soft and collinear radiation in collider processes can be described in a universal way, that is independent of the underlying process. Recent years have seen a number of approaches for probing whether radiation beyond the leading soft approximation can also be systematically classified. In this paper, we study a formula that captures the leading next-to-soft QCD radiation affecting processes with both final- and initial-state partons, by shifting the momenta in the nonradiative squared amplitude. We first examine W+jet production, and show that a previously derived formula of this type indeed holds in the case in which massive color singlet particles are present in the final state. Next, we develop a physical understanding of the momentum shifts, showing precisely how they disrupt the well-known angular ordering property of leading soft radiation.

Original language	English
Article number	074005
Number of pages	16
Journal	Physical Review D
Volume	109
Issue number	7
DOIs	https://doi.org/10.1103/PhysRevD.109.074005
Publication status	Published - 8 Apr 2024

Bibliographical note

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.

Funding

E. L. and A. T. would like to thank the MHRD Government of India, for the SPARC Grant No. SPARC/2018-2019/P578/SL, entitled Perturbative QCD for Precision Physics at the HIC. C. D. W. is supported by the UK Science and Technology Facilities Council (STFC) Grants No. ST/P000258/1 and No. ST/T000759/1. M. v. B. was supported by a Royal Society Research Professorship (RPnR1n180112) , and by the STFC Grant No. ST/T000864/1. S. P. would like to thank Satyajit Seth for useful discussions. S. P. would like to thank the Physical Research Laboratory, Department of Space, Government of India, for a Post Doctoral Fellowship. A. D. would like to thank CSIR, Government of India, for an SRF fellowship (09/1001 (00 49) /2019-EMR-I) .

Funders	Funder number
MHRD Government of India	SPARC/2018-2019/P578/SL
UK Science and Technology Facilities Council (STFC)	ST/P000258/1, ST/T000759/1
Royal Society Research Professorship	RPnR1n180112
STFC	ST/T000864/1
Department of Space, Government of India
CSIR, Government of India	09/1001 (00 49) /2019-EMR-I

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Next-to-soft radiation from a different angle

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