Prospects for strong coupling measurement at hadron colliders using soft-drop jet mass

被引：9

作者：

Hannesdottir, Holmfridur S. ^{[1
,2
]}

Pathak, Aditya ^{[3
,4
,5
]}

Schwartz, Matthew D. ^{[2
]}

Stewart, Iain W. ^{[6
]}

机构：

[1] Inst Adv Study, Einstein Dr, Princeton, NJ 08540 USA

[2] Harvard Univ, Dept Phys, Cambridge, MA 02138 USA

[3] Deutsch Elektronen Synchrotron DESY, Notkestr 85, D-22607 Hamburg, Germany

[4] Univ Manchester, Sch Phys & Astron, Manchester M13 9PL, England

[5] Univ Vienna, Fac Phys, Boltzmanngasse 5, A-1090 Vienna, Austria

[6] MIT, Ctr Theoret Phys, Cambridge, MA 02139 USA

来源：

JOURNAL OF HIGH ENERGY PHYSICS | 2023年 / 2023卷 / 04期

基金：

奥地利科学基金会;

关键词：

Factorization; Renormalization Group; Jets and Jet Substructure; Resummation; The Strong Coupling;

D O I：

10.1007/JHEP04(2023)087

中图分类号：

O412 [相对论、场论]; O572.2 [粒子物理学];

学科分类号：

摘要：

We compute the soft-drop jet-mass distribution from pp collisions to NNLL accuracy while including nonperturbative corrections through a field-theory based formalism. Using these calculations, we assess the theoretical uncertainties on an alpha(s) precision measurement due to higher order perturbative effects, nonperturbative corrections, and PDF uncertainty. We identify which soft-drop parameters are well-suited for measuring alpha(s), and find that higher-logarithmic resummation has a qualitatively important effect on the shape of the jet-mass distribution. We find that quark jets and gluon jets have similar sensitivity to alpha(s), and emphasize that experimentally distinguishing quark and gluon jets is not required for an alpha(s) measurement. We conclude that measuring alpha(s) to the 10% level is feasible now, and with improvements in theory a 5% level measurement is possible. Getting down to the 1% level to be competitive with other state-of-the-art measurements will be challenging.

引用

页数：75

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