Abstract
We consider the factorized groomed jet mass distribution in inclusive jet processes by using a modified mass drop tagger (mMDT), corresponding to a soft drop with angular exponent β = 0. A grooming procedure is implemented rather than tagging in the sense that grooming always returns a groomed jet, while tagging dose not return a jet when a single particle remains after tagging. We find that the grooming procedure makes the jet mass distribution infrared safe and that only ultraviolet divergences appear in each factorized part. The groomed jet mass distributions are investigated over a wide range of the jet mass considering various limits on the jet mass variable ρ = M 2 J /(p J T R)2 and the grooming cut yc. Appropriate effective theories in different kinematic regions are employed to resum large logarithms, in which the analysis in the region ρ ~ yc ≪ 1 is included due to the different type of factorization. The analytic computation of the factorized groomed jet mass distribution is presented by resumming the large logarithms in the jet mass, and yc. Numerically, the effect of the resummation is notably enhanced, compared with the calculation at next-to-leading order, and nonglobal logarithms are estimated to be small.
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Chay, J., Kim, C. Factorized Groomed Jet Mass Distribution in Inclusive Jet Processes. J. Korean Phys. Soc. 74, 439–458 (2019). https://doi.org/10.3938/jkps.74.439
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DOI: https://doi.org/10.3938/jkps.74.439