Light quark Yukawa couplings from Higgs kinematics

We show that the normalized Higgs production p[subscript T] and y[subscript h] distributions are sensitive probes of Higgs couplings to light quarks. For up and/or down quark Yukawa couplings comparable to the SM b quark Yukawa the ūu or d[overbar]d fusion production of the Higgs could lead to appre...

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Bibliographic Details
Main Authors: Zupan, Jure, Soreq, Yotam, Zhu, HuaXing
Other Authors: Massachusetts Institute of Technology. Center for Theoretical Physics
Format: Article
Language:English
Published: Springer-Verlag/SISSA 2017
Online Access:http://hdl.handle.net/1721.1/107962
Description
Summary:We show that the normalized Higgs production p[subscript T] and y[subscript h] distributions are sensitive probes of Higgs couplings to light quarks. For up and/or down quark Yukawa couplings comparable to the SM b quark Yukawa the ūu or d[overbar]d fusion production of the Higgs could lead to appreciable softer p[subscript T] distribution than in the SM. The rapidity distribution, on the other hand, becomes more forward. We find that, owing partially to a downward fluctuation, one can derive competitive bounds on the two couplings using ATLAS measurements of normalized p[subscript T] distribution at 8 TeV. With 300 fb[superscript −1] at 13 TeV LHC one could establish flavor non-universality of the Yukawa couplings in the down sector.