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Theory Seminar (High Energy/Cosmology)

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Events During the Week of October 23rd through October 30th, 2016

Monday, October 24th, 2016

No events scheduled

Tuesday, October 25th, 2016

Exploring El Dorado with intersecting D6-branes
Time: 3:30 pm
Place: 5280 Chamberlin
Speaker: Wieland Staessens, IFT, Madrid
Abstract: Toroidal orbifolds represent the most fruitful and best understood backgrounds for string model building. When it comes to type IIA intersecting D6-branes, the most promising toroidal orbifold is undoubtedly T6/Z2xZ6 with discrete torsion. In this talk, we will discuss how to obtain on this background three generational chiral models without unwanted exotic matter charged under the Standard Model gauge group and present global supersymmetric extensions of the Standard Model. A second part of the talk will discuss deformations of the singularities and their implications for the global models.
Host: Gary Shiu
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Wednesday, October 26th, 2016

No events scheduled

Thursday, October 27th, 2016

Phenomenology of Enhanced Light Quark Yukawa Couplings and the Wh Charge Asymmetry
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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Friday, October 28th, 2016

No events scheduled