Joint Theory Seminar
Speaker: Gordan Krnjaic (Perimeter Institute)
Title: Gauging the Way to MFV
Host: Yuhsin Tsai
Room: 432
Abstract: In this talk, I will present a UV complete model with a gauged flavor symmetry which approximately realizes holomorphic Minimal Flavor Violation (MFV) in R-parity violating (RPV) supersymmetry. Previous work has shown that imposing MFV as an ansatz easily evades direct constraints and has interesting collider phenomenology. The model in this work spontaneously breaks the flavor symmetry and features the minimum "exotic" field content needed to cancel anomalies. The flavor gauge bosons exhibit an inverted hierarchy so that those associated with the third generation are the lightest. This allows low energy flavor constraints to be easily satisfied and leaves open the possibility of flavor gauge bosons accessible at the LHC. The usual MSSM RPV operators are all forbidden by the new gauge symmetry, but the model allows a purely "exotic" operator which violates both R-parity and baryon number. Since the exotic fields mix with MSSM-like right handed quarks, diagonalizing the full mass matrix after flavor-breaking transforms this operator into the trilinear baryon number violating operator UDD with flavor coefficients all suppressed by three powers of Yukawa couplings. There is a limit where this model realizes exact MFV; we compute corrections away from MFV, show that they are under theoretical control, and find that the model is viable in large regions of parameter space.
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High-Energy Seminars
Time:
9:00am - 10:00am
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Description:
HE Seminar
Speaker:Reserved for Faculty Candidate
Title:
Host:Svoboda
Room: 285
Abstract:
User:
High-Energy Seminars
Time:
4:10am - 5:10am
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Description:
LHC Lunch
Speaker:
Title:
Host: Markus Luty
Room: 432
Abstract:
User:
High-Energy Seminars
Time:
3:00am - 9:30am
Description:
<a href="http://particle.physics.ucdavis.edu/hefti/lectures/frontiers/index.html">Frontiers of Physics</a><br/>
Title: Higgs, Dark Energy, Black Holes<br/>
Time: 10 am - 4:30 pm<br/>
<a style="color: #FF0000;" href="http://particle.physics.ucdavis.edu/hefti/lectures/frontiers/Event_Details.html">Event Details Web page</a>
User:
High-Energy Seminars
Time:
6:30am - 7:30am
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Description:
Joint Theory Seminar
Speaker:
Title:
Host:
Room: 432
Abstract:
User:
High-Energy Seminars
Time:
9:00am - 10:00am
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Description:
Faculty Candidate Seminar
Speaker:Peter Sorensen
Title:Prospects for direct detection of dark matter in 2013 and beyond
Host:Svoboda
Room: 185
Abstract: I will discuss efforts to directly detect interactions of galactic dark matter
particles, with a focus on dual phase liquid xenon detector technology. First results from the 350 kg LUX experiment are expected before the end of 2013, and after a roughly 300 day search campaign LUX will represent the state of the art
sensitivity over much of the mass range expected for Weakly Interacting Massive Particles (WIMPs). I will discuss the Achilles' Heel of this very successful detector technology, the nuclear recoil energy scale, and plans to address it. LUX
was designed to detect WIMPs, and while the WIMP hypothesis is very compelling, it is not the only possibility. I will describe efforts to adapt liquid xenon detector technology to search for dark matter particles with non-weak scale masses, via "non-standard" detection techniques. Finally, I will discuss what we can expect from
next-generation experiments such as LZ.
User:
High-Energy Seminars
Time:
8:10am - 9:10am
Description:
Faculty Candidate Seminar
Speaker:Stanley Seibert
Title: Taking Inventory of the Universe: Exploring the Mystery of Dark Matter with the MiniCLEAN Experiment
Host:Svoboda
Room: 416
Abstract: Astronomical observations have produced a tremendous amount of evidence that the gravitational interactions we observe in the cosmos cannot be produced entirely by the particles in the Standard Model. The dark matter hypothesis can explain this mystery by postulating an additional kind of matter that does not interact electromagnetically. But can we detect a new particle in the lab that is even more elusive than the neutrino? I will review the current state of experimental results in the search for dark matter, and describe the upcoming MiniCLEAN experiment, the next member of the DEAP/CLEAN family of dark matter experiments. Coming online this summer, MiniCLEAN will use liquid argon scintillation in a detector with a 150 kg fiducial mass to search for weakly interacting massive particles, a favored dark matter candidate. The technology is highly scalable, with a direct development path to 10-100 ton argon or neon target masses that can be used in both solar neutrino and dark matter studies.
User:
High-Energy Seminars
Time:
4:10am - 5:10am
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Yes - 0 days 4 hour 0 minutes before start
Description:
LHC Lunch
Speaker:
Title:
Host: Markus Luty
Room: 432
Abstract:
User:
High-Energy Seminars
Description:
Faculty Candidate Seminar
Speaker:Hugh Lippincott
Title: COUPP: Searching for dark matter with bubble chambers
Host:Svoboda
Room: 185
Abstract: I will talk about the Chicagoland Observatory for Underground Particle Physics (COUPP), a program that uses bubble chambers to search for dark matter particles. Unlike the bubble chambers of the 1960s and 1970s, COUPP bubble chambers are operated in only mildly superheated conditions, rendering them insensitive to the minimum ionizing particles that typically constitute the largest background in dark matter searches. The bubble chamber allows for rejection of other backgrounds as well - for example, alpha decays can be discriminated from signal events because they sound louder. The result is a detector with minimal backgrounds that can be easily scaled to large masses. I will introduce the field of direct detection of dark matter and discuss the status of COUPP, including results from the COUPP-4 detector operated at the deep underground site SNOLAB and a progress report on COUPP-60, currently being commissioned.
User:
High-Energy Seminars
Time:
6:30am - 7:30am
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Description:
Joint Theory Seminar
Speaker: Bogdan Dobrescu (Fermilab)
Title: Higgs couplings and exotic decays
Host: Hsin-Chia Cheng
Room: 432
Abstract:
User:
High-Energy Seminars
Time:
9:00am - 10:00am
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Yes - 1 day 8 hour 0 minutes before start
Description:
HE Seminar
Speaker:
Title:
Host:
Room: 285
Abstract:
User:
High-Energy Seminars
Time:
9:10am - 10:10am
Description:
User:
High-Energy Seminars
Time:
4:10am - 5:10am
Send Reminder:
Yes - 0 days 4 hour 0 minutes before start
Description:
LHC Lunch
Speaker:
Title:
Host: Markus Luty
Room: 432
Abstract:
User:
High-Energy Seminars
Time:
All day event
Description:
The workshop will bring together experimentalists and theorists to discuss the LHC Higgs-like signal, its nature and the implications for BSM theories, especially SUSY.
Go to the <a href="http://particle.physics.ucdavis.edu/workshops/doku.php?id=2013:susy-after-higgs">Higgs Workshop web page</a>.
User:
High-Energy Seminars
Time:
6:00am
Description:
Faculty Candidate Seminar
Speaker:Kendall Mahn
Title: Neutrinos: window on the universe
Host:Svoboda
Room: 416
Abstract: The observation that neutrinos change from one flavor to another as they propagate, or "neutrino oscillation", has been one of the most surprising results in particle physics in the last two decades. Through neutrino oscillation, we now know neutrinos have a small but non-zero mass, which has wide ranging implications for astrophysics, and cosmology. The T2K experiment studies neutrino oscillation by using a >99.5\% pure beam of muon neutrinos sent through Japan. This seminar will describe the recent T2K results on electron neutrino appearance and muon neutrino disappearance in a muon neutrino beam, the consequences for the origin of neutrino mass and implications for the future of neutrino physics.
User:
High-Energy Seminars
Time:
6:30am - 7:30am
Send Reminder:
Yes - 0 days 4 hour 0 minutes before start
Description:
Joint Theory Seminar
Speaker:
Title:
Host:
Room: 432
Abstract:
User:
High-Energy Seminars
Time:
All day event
Description:
Higgs Workshop
<a href="http://particle.physics.ucdavis.edu/workshops/doku.php?id=2013:susy-after-higgs">workshop web page</a>
User:
High-Energy Seminars
Time:
9:00am - 10:00am
Send Reminder:
Yes - 1 day 8 hour 0 minutes before start
Description:
HE Seminar
Speaker:
Title:
Host:
Room: 285
Abstract:
User:
High-Energy Seminars
Time:
All day event
Description:
The workshop will bring together experimentalists and theorists to discuss the LHC Higgs-like signal, its nature and the implications for BSM theories, especially SUSY.
Go to the <a href="http://particle.physics.ucdavis.edu/workshops/doku.php?id=2013:susy-after-higgs">Higgs Workshop web page</a>.
User:
High-Energy Seminars
Time:
All day event
Description:
The workshop will bring together experimentalists and theorists to discuss the LHC Higgs-like signal, its nature and the implications for BSM theories, especially SUSY.
Go to the <a href="http://particle.physics.ucdavis.edu/workshops/doku.php?id=2013:susy-after-higgs">Higgs Workshop web page</a>.
User:
High-Energy Seminars
Time:
All day event
Description:
The workshop will bring together experimentalists and theorists to discuss the LHC Higgs-like signal, its nature and the implications for BSM theories, especially SUSY.
Go to the <a href="http://particle.physics.ucdavis.edu/workshops/doku.php?id=2013:susy-after-higgs">Higgs Workshop web page</a>.
User:
High-Energy Seminars
Time:
5:10am - 6:10am
Send Reminder:
Yes - 0 days 4 hour 0 minutes before start
Description:
LHC Lunch
Speaker:
Title:
Host: Markus Luty
Room: 432
Abstract:
User:
High-Energy Seminars
Time:
All day event
Description:
The workshop will bring together experimentalists and theorists to discuss the LHC Higgs-like signal, its nature and the implications for BSM theories, especially SUSY.
Go to the <a href="http://particle.physics.ucdavis.edu/workshops/doku.php?id=2013:susy-after-higgs">Higgs Workshop web page</a>.
User:
High-Energy Seminars
Time:
6:30am - 7:30am
Send Reminder:
Yes - 0 days 4 hour 0 minutes before start
Description:
Joint Theory Seminar
Speaker: Yasha Neiman
Title: The imaginary part of the action in Lorentzian gravity
Host: Steve Carlip
Room: 432
Abstract: The action of classical gravity in a Lorentzian region has an imaginary part, arising from the boundary term. The expression for this imaginary part is directly related to the black hole entropy formula. The result continues to hold for higher-derivative gravity and in the presence of matter couplings. I show how the action's imaginary part can be directly calculated, and also how its key properties can be established abstractly. I evaluate the imaginary action on a selection of interesting regions involving horizons and asymptotic boundaries. Finally, I speculate on possible implications for quantum gravity.
User:
High-Energy Seminars
Time:
9:00am - 10:00am
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Yes - 1 day 8 hour 0 minutes before start
Description:
HE Seminar
Speaker: Greg Sullivan, University of Maryland
Title: Results from The IceCube Neutrino Detector and Potential Physics from Future Upgrades
Host: Svoboda
Room: 285
Abstract: The IceCube neutrino detector, deployed in the deep clear ice at the Antarctic South
Pole, completed construction in December 2010 with operations of the full instrument commencing in 2011. IceCube represents the first kilometer-cubed class neutrino telescope and is the first such instrument to reach sensitivities of astrophysical interest. I report on the current measurements from IceCube that search for high energy neutrinos of astrophysical origin, both a diffuse flux and point source fluxes. I will also report on the low-energy capability of the current IceCube detector with the observation of neutrino oscillations and speculate on the
potential for making further measurements in the neutrino oscillation sector with
future upgrades.
6:30am» Joint Theory Seminar: Gordan Krnjaic