Speaker: Luchang Jin
Title: Lattice calculations in muon g-2
Zoom: https://zoom.us/j/186024391
Host: Markus Luty
Abstract: Fermilab has just announced a new experimental result for muon g-2. The
statistical uncertainty of the new result is similar to the previous BNL
result and the central value is consistent. The combined value is now
4.2 standard deviation away from the Standard Model prediction. For the
Standard Model prediction, the two hadronic contributions, HVP (hadronic
vacuum polarization) and HLbL (hadronic light-by-light) are the dominate
sources of uncertainty. I will review the lattice calculations in
determining these two hadronic contributions.
Description:
Cinco de Mayo
User:
High-Energy Seminars
Time:
2:00pm - 3:00pm
Send Reminder:
Yes - 3 days 6 hour 0 minutes before start
Description:
Speaker:Yang Bai
Title:Magnetic Black Holes with Electroweak-Symmetric Coronas
Zoom: https://zoom.us/j/186024391
Host:
Abstract:
Magnetically charged black holes are interesting solutions of the Standard Model and general relativity. They may possess a "hairy" electroweak-symmetric corona outside the event horizon, which speeds up their Hawking radiation and leads them to become nearly extremal on short timescales. In this talk, I will discuss their properties and various approaches to search for them in our current universe.
User:
High-Energy Seminars
Time:
2:00pm - 3:00pm
Send Reminder:
Yes - 3 days 6 hour 0 minutes before start
Description:
Speaker: Yuhsin Tsai
Title: Cosmological Particle Production and Pairwise Hotspots on the CMB
Zoom: https://zoom.us/j/186024391
Host:
Abstract:
Cosmic inflation provides an environment similar to particle colliders that can produce new particles and record the resulting signals. In this talk, I will describe a scenario in which heavy particles are produced during inflation via their couplings to the inflaton. These heavy particles propagate classically and give rise to localized spots on the cosmic microwave background following their production. Momentum conservation during particle production dictates that these localized spots come in pairs. I will discuss the properties of such pairs of CMB spots and the prospect of their detection from the thermal fluctuation background in a position space search.
User:
High-Energy Seminars
Time:
4:00pm - 6:00pm
Description:
Speaker: James Mott (FNAL)
Title: First results from the Muon g – 2 Experiment at Fermilab
The Muon g – 2 Experiment searches for evidence of new particles and forces by making precise measurements of the magnetic moment of the muon. By comparing the experimental value with theoretical predictions, the experiment conducts a stringent test of the Standard Model (SM). A difference between the two could be a possible indication of new physics. This talk will present the first results from the Muon g – 2 Experiment at Fermilab, which has measured a value 3.3 standard deviations away from the SM prediction. When combined with a previous experimental result from Brookhaven National Laboratory the difference increases to 4.2 standard deviations.
User:
High-Energy Seminars
Time:
2:00pm - 3:00pm
Send Reminder:
Yes - 3 days 6 hour 0 minutes before start
Description:
Speaker: Csaba Csaki
Title: Crunching away the hierarchy problem
Zoom: https://zoom.us/j/186024391
Host: John Terning
Abstract: I present a novel approach to hierarchies related to crunching of regions of space-time. First we use this approach to solve the Higgs hierarchy problem by coupling the SM Higgs to a dilaton of a spontaneously broken CFT, where the dilaton potential will be in a long-lived metastable minimum if the Higgs VEV is below ~ 1 TeV, otherwise it will quickly settle to a minimum with a large negative CC leading to a big crunch. The experimental prediction of this model is a light (<10 GeV) dilaton with very weak coupling to SM particles via its mixing with the Higgs. Along a similar direction we can also provide a new paradigm for the CC problem: regions of space with a large CC will be very short lived, and only those with a small CC survive to date. This requires a super-cooled phase transition which can again be implemented by assuming the presence of a hidden CFT sector, leading to a prediction of additional relativistic degrees of freedom observable at the next round of CMB measurements.
