Joint Theory Seminar
Speaker: Jack Collins
Title: Learning to find new physics in jets
Host: John Terning
Room: 432
Abstract: New particles may be produced at the LHC with very high boost, for instance if they result from the decay of a heavier resonance. If these boosted particles decay hadronically then their signature is a single fat jet, perhaps with unusual substructure. I will discuss new techniques to search for such boosted resonances, whether their properties are predicted by existing models or if they are completely unexpected. This will make use of recent advances in jet substructure and machine learning.
Joint Theory Seminar
Speaker: Jeff Dror (UC Berkeley)
Title: New constraints on light vectors coupled to non-conserved currents
Host: Verhaaren
Room: 432
Abstract:
<p>Joint Theory Seminar Speaker: mail: Title: Host: Room: 432 Abstract:</p>
User:
High-Energy Seminars
Time:
8:10am - 9:10am
Send Reminder:
Yes - 1 day 4 hour 0 minutes before start
Description:
High Energy Seminar
Speaker: Csaba Csaki
Title: Neutron Stars Chirp About Vacuum Energy
Host: John Terning
Room: 285
Abstract: While the current vacuum energy of the Universe is very small, in our standard cosmological picture it has been much larger at earlier epochs. We try to address the question of what are possible ways to try to experimentally verify the properties of vacuum energy in phases other than the SM vacuum. One promising direction is to look for systems where vacuum energy constitutes a non-negligible fraction of the total energy, and study the properties of those. Neutron stars could be such systems, and we discuss how to use the recent observation of neutron star mergers to try to learn about the inner core of the neutron star which may be dominated by vacuum energy.
User:
High-Energy Seminars
Time:
5:30am - 6:30am
Send Reminder:
Yes - 1 day 4 hour 0 minutes before start
Description:
Joint Theory Seminar
Speaker: Sebastian Ellis (SLAC)
Title: Effective Field Theory: Functional matching at 1-loop
Host: Xiaochuan Lu
Room: 432
Abstract: As the LHC pushes the scale of possible new physics higher and we prepare to enter an era of high intensity and precision measurements, the benefits of using Effective Field Theory (EFT) as a framework for searching for new physics are clear. The effects of new physics are encapsulated in the Wilson coefficients of higher-dimensional operators, which are then constrained by a global fit to experimental data. We will discuss recent advances in calculating these coefficients by matching UV theories to EFT operators at 1-loop using functional methods, resulting in the "Universal One-Loop Effective Action" (UOLEA). In particular, we will discuss how to account for previously omitted contributions, and present applications. Finally, we will discuss the next steps towards a complete UOLEA.
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