TY - JOUR
T1 - New Standard for the Logarithmic Accuracy of Parton Showers
AU - Van Beekveld, Melissa
AU - Dasgupta, Mrinal
AU - El-Menoufi, Basem Kamal
AU - Ferrario Ravasio, Silvia
AU - Hamilton, Keith
AU - Helliwell, Jack
AU - Karlberg, Alexander
AU - Monni, Pier Francesco
AU - Salam, Gavin P.
AU - Scyboz, Ludovic
AU - Soto-Ontoso, Alba
AU - Soyez, Gregory
N1 - Publisher Copyright:
© 2025 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 - 2025/1/10
Y1 - 2025/1/10
N2 - We report on a major milestone in the construction of logarithmically accurate final-state parton showers, achieving next-to-next-to-leading-logarithmic (NNLL) accuracy for the wide class of observables known as event shapes. The key to this advance lies in the identification of the relation between critical NNLL analytic resummation ingredients and their parton-shower counterparts. Our analytic discussion is supplemented with numerical tests of the logarithmic accuracy of three shower variants for more than a dozen distinct event-shape observables in Z→qq¯ and Higgs→gg decays. The NNLL terms are phenomenologically sizeable, as illustrated in comparisons to data.
AB - We report on a major milestone in the construction of logarithmically accurate final-state parton showers, achieving next-to-next-to-leading-logarithmic (NNLL) accuracy for the wide class of observables known as event shapes. The key to this advance lies in the identification of the relation between critical NNLL analytic resummation ingredients and their parton-shower counterparts. Our analytic discussion is supplemented with numerical tests of the logarithmic accuracy of three shower variants for more than a dozen distinct event-shape observables in Z→qq¯ and Higgs→gg decays. The NNLL terms are phenomenologically sizeable, as illustrated in comparisons to data.
UR - http://www.scopus.com/inward/record.url?scp=85214302097&partnerID=8YFLogxK
U2 - 10.1103/PhysRevLett.134.011901
DO - 10.1103/PhysRevLett.134.011901
M3 - Article
AN - SCOPUS:85214302097
SN - 0031-9007
VL - 134
JO - Physical Review Letters
JF - Physical Review Letters
IS - 1
M1 - 011901
ER -