Conveners
Beyond the Standard Model Phenomenology 2
- Kaladi Babu
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Mr Sumit Biswas (Student)03/11/2024, 09:00
We propose an $E_6$-inspired Pati-Salam (PS) model that naturally accommodates multi-TeV leptoquark gauge bosons, $X_\mu$, while incorporating an unbroken discrete $Z_2$ symmetry. In this model, Standard Model (SM) fermions are $Z_2$-even, while exotic fermions in the PS multiplets are $Z_2$-odd. A notable feature is that the PS gauge bosons are $Z_2$-odd, resulting in their coupling...
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Ravneet Bedi (University of Minnesota)03/11/2024, 09:18
We propose a solution to the strong CP problem that specifically relies on massless quarks and has no light axion. The QCD color group $SU(3)_c$ is embedded into a larger, simple gauge group (grand-color) where one of the massless, colored fermions enjoys an anomalous chiral symmetry, rendering the strong CP phase unphysical. The grand-color gauge group $G_{\rm GC}$ is Higgsed down to...
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Sai Charan Chandrasekar (PhD Student at Oklahoma State University)03/11/2024, 09:36
The axion solution to the strong CP problem is closely entwined with the flavor structure of the standard model. So our model attempts at explaining the Flavor puzzle through the Frogatt Nielsen mechanism where the $U(1)_F$ flavor symmetry is gauged and we thereby end up with a "quality axion" as the result of a residual $U(1)_{PQ}$ symmtery. This is achieved in a DFSZ like scenario with a...
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AJAY Kaladharan03/11/2024, 09:54
In this talk, I explain the baryon asymmetry of the universe via Dirac leptogenesis in the left-right symmetric model in which the fermion masses are generated through a universal seesaw mechanism. This model is further motivated by providing an axionless solution to the strong CP problem. Similar to standard leptogenesis, the decay of heavy vector-like leptons generates CP violation and leads...
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Tao Zhou (Texas A&M University)03/11/2024, 10:12
We perform a simulation of dark-vector production from electromagnetic cascades at SHiP. The cascades are initiated by photons from $\pi^0\rightarrow \gamma \gamma$, and lead to substantial increases in sensitivity for long-lived dark vectors with masses below $\sim 50-300~{\rm MeV}$. The dominant production mode in the regions of new sensitivity is $e^+ e^- \rightarrow V(\gamma)$. New...
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Morgan Cassidy03/11/2024, 10:30
In a first order phase transition, a barrier forms between two minima. The transition from false to true minimum proceeds through tunneling, and the probability of the transition is determined by the bounce action. Techniques have been developed to solve for the field configuration that minimizes the action. More recently, J.R. Espinosa developed a method that introduces an auxiliary tunneling...
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