Joint Theory Seminar
Speaker: Bryan Ostdiek (U. of Oregon)
Title: New search strategies for the well tempered neutralino
Host: Ennio Salvioni
Room: 432
Abstract: Supersymmetry with R parity provides a stable dark matter candidate. However, over much of the parameter space, the dark matter candidate does not freeze out to the observed relic abundance. One method to achieve the observed relic abundance relies on the co-annihilation of multiple, nearly-degenerate electroweakino states. This so-called well tempering evades traditional collider searches because the compressed spectrum leaves soft decay products. I outline new strategies that take advantage of this compressed spectrum and estimate its usefulness at the LHC and a future 100 TeV collider.
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Groundhog Day
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High-Energy Seminars
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8:00am - 9:00am
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High Energy Seminar
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High-Energy Seminars
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4:10am - 5:10am
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High-Energy Seminars
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5:30am - 7:00am
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Terning Group Meeting
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High-Energy Seminars
Time:
7:30am - 9:00am
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Meeting of Steve Carlip's grad students
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High-Energy Seminars
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5:30am - 6:30am
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Description:
Joint Theory Seminar
Speaker: Brian Shuve (SLAC)
Title: Soft Signatures of New Physics at Colliders
Host: Ennio Salvioni
Room: 432
Abstract: Colliders such as the LHC are excellent environments for producing and studying new particles that can be responsible for phenomena such as dark matter, baryogenesis, and neutrino masses. However, if the masses of the new particles are small relative to collider energies, their striking signatures could be missed with existing search strategies that focus on high-energy processes. I will discuss cosmologically inspired scenarios that are unexplored with current methods, and use these to motivate new searches sensitive to a range of phenomena at and below the weak scale. I will also show the complementary prospects for lower-energy, high-intensity experiments such as B factories.
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High-Energy Seminars
Time:
9:00am - 10:00am
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Description:
High Energy Seminar
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Room: 432
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High-Energy Seminars
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4:10am - 5:10am
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High-Energy Seminars
Time:
5:30am - 7:00am
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Terning Group Meeting
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High-Energy Seminars
Time:
7:30am - 9:00am
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Meeting of Steve Carlip's grad students
Description:
Valentine's Day
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High-Energy Seminars
Time:
5:30am - 6:30am
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Description:
Joint Theory Seminar
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Room: 432
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Presidents' Day
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High-Energy Seminars
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9:00am - 10:00am
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Description:
High Energy Seminar
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Room: 432
Abstract:
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High-Energy Seminars
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4:10am - 5:10am
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High-Energy Seminars
Time:
5:30am - 7:00am
Description:
Terning Group Meeting
User:
High-Energy Seminars
Time:
7:30am - 9:00am
Description:
Meeting of Steve Carlip's grad students
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High-Energy Seminars
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5:30am - 6:30am
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Description:
Joint Theory Seminar
Speaker: Keisuke Harigaya (UC Berkeley)
Title: A composite model for the 750 GeV diphoton excess
Host: Xiaochuan Lu
Room: 432
Abstract: We study a simple model in which the recently reported 750 GeV diphoton excess arises from a composite pseudo Nambu-Goldstone boson (hidden pion) produced by gluon fusion and decaying into two photons. The model only introduces an extra hidden gauge group at the TeV scale with a vectorlike quark in the bifundamental representation of the hidden and standard model gauge groups. We discuss the collider phenomenology and cosmology of hidden pions and other hidden resonances.
We discuss possible theoretical structures above the TeV scale, e.g. conformal dynamics and supersymmetry, and their phenomenological implications.
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High-Energy Seminars
Time:
9:00am - 10:00am
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Description:
High Energy Seminar
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Room: 432
Abstract:
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High-Energy Seminars
Time:
4:10am - 5:10am
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Name:
User:
High-Energy Seminars
Time:
5:30am - 7:00am
Description:
Terning Group Meeting
User:
High-Energy Seminars
Time:
7:30am - 9:00am
Description:
Meeting of Steve Carlip's grad students
User:
High-Energy Seminars
Time:
5:30am - 6:30am
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Yes - 3 days 4 hour 0 minutes before start
Description:
Joint Theory Seminar
Speaker: Michael Baker (JGU Mainz)
Title: The Coannihilation Codex
Host: Ennio Salvioni
Room: 432
Abstract: We present a classification of simplified models of coannihilating dark matter. Assuming tree-level and renormalizable interactions we construct all possible simplified models (containing dark matter, its coannihilation partner and possibly a mediator) which respect gauge and Lorentz invariance. We go on to identify the possible LHC signatures associated with these models and identify new search strategies. Finally we apply these new searches to a leptoquark mediated dark matter model.
