[PAST EVENT] Defense Seminar - Marco Antonio Merchand Medina (Ph.D.)

April 15, 2020
12:30pm - 3:30pm
Remote via Zoom
Access & Features
  • Open to the public

Please mark your calendars and plan to join other members of the College community for the following event:

Seminar/Defense for the Doctor of Philosophy Degree in Physics by: 
Marco Antonio Merchand Medina, Ph.D. Candidate in Physics
Advisor: Marc Sher
Dissertation Title: "Study of Scalar Extensions for Physics Beyond the Standard Model"

You are invited to join the scheduled Zoom meeting hosted by Professor Marc Sher at
https://cwm.zoom.us/j/7116417933 Meeting ID: 711 641 7933 

Abstract: In this thesis we investigate the phenomenology of beyond the Standard Model scenarios with extra scalar fields. A review and motivation of extended electroweak symmetry breaking is presented. Then we address observational evidence of new physics such as possible lepton flavor violating processes and the relic abundance of dark matter by implementing models with three Higgs doublets. The complementarity between theoretical restrictions and experimental bounds on some of the predicted signals is leveraged to sharpen the allowed parameter space. After that we study embeddings of two-Higgs doublets into the Randall-Sundrum model with emphasis on the scalar fluctuations of the metric tensor and the stabilization mechanism: i) the viability of Higgs-radion unification is reappraised as well as some amendments to it, ii) additionally, kinetic mixing between radion and two Higgs doublets is explored. Theoretical predictions are tested against the most current experimental data and new avenues of discovery are highlighted. We devote the last part of this thesis to study how the axion solution to the strong CP problem can be unified with the dynamical flavor symmetry explanation for the huge hierarchies observed on the fermions.

Bio: Marco is a physics student from Mexico. He earned his Bachelor degree from the University of Colima, Mexico in 2014. In the fall of the same year he started the physics Ph.D. program at William & Mary. In 2016 he joined the High Energy physics group and started doing research under the supervision of Prof. Marc Sher. After graduation he will start a Postdoc position at the University of Warsaw in September.