Theory Seminar (High Energy/Cosmology)

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Phenomenology of Enhanced Light Quark Yukawa Couplings and the Wh Charge Asymmetry
Date: Thursday, October 27th
Time: 3:30 pm
Place: 4274 Chamberlin Hall
Speaker: Felix Yu
Abstract: I propose the measurement of the Wh charge asymmetry as a<br>
consistency test for the Standard Model Higgs, which is sensitive<br>
to enhanced Yukawa couplings of the first and second generation<br>
quarks. I present a collider analysis for the charge asymmetry in the<br>
same-sign lepton final state, pp to Wh to l nu l nu jj, <br>
aimed at discovery significance for the SM Wh <br>
production mode in each charge channel with 300 fb^-1 of 14 TeV<br>
LHC data. Using this decay mode, I estimate the statistical precision<br>
on the charge asymmetry should reach 0.4% with 3 ab^-1<br>
luminosity, enabling a strong consistency test of the SM Higgs<br>
hypothesis. I also discuss direct and indirect constraints on light<br>
quark Yukawa couplings from direct and indirect probes of the Higgs<br>
width as well as Tevatron and Large Hadron Collider Higgs data. While<br>
the main effect from enhanced light quark Yukawa couplings is a rapid<br>
increase in the total Higgs width, such effects could be mitigated in<br>
a global fit to Higgs couplings, leaving the Wh charge<br>
asymmetry as a novel signature to test directly the Higgs couplings to<br>
light quarks.
Host: Joshua Berger
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