Welcome! Our mission is to advance research in
theoretical and experimental physics at the interface
of the Energy, Intensity, and Cosmic frontiers.

We seek answers to key open questions about
nature’s fundamental interactions, such as:

Why is there more matter than anti-matter in the Universe?

What additional forces were active during the first moments after the Big Bang?

How are protons and neutrons put together?

We address these and other questions through international
topical workshops; a visiting researcher program;
UMass faculty, staff, and student research
as well as other activities.

News & Announcements

Probing the Electroweak Phase Transition with a Next Generation PP Collider

Thursday, September 17, 2015 - 9:00am to Saturday, September 19, 2015 - 2:00pm

Lederle Graduate Research Tower (LGRT) 419B, UMass Amherst

This will be the first in a series of workshops focusing on the physics opportunities with a next generation proton-proton collider.

The goal of the workshop is to identify the high energy collider signatures associated with different scenarios for the electroweak phase transition, focusing on opportunities for a next generation pp collider. Exploring the thermal history associated with electroweak symmetry breaking is a question at the forefront of particle physics and cosmology. In the Standard Model, EWSB is associated with a cross over transition. However, in a variety of well-motivated SM extensions, the nature of the EWSB transition may be different. Of particular interest is the possibility of a first order electroweak phase transition that would provide conditions needed for electroweak baryogenesis.

The format will involve a mixture of informal talks and discussions including both theorists and experimentalists. We anticipate that the workshop will lead to new dedicated studies to identify the physics reach of a ~ 100 TeV pp collider with respect to the electroweak phase transition.

Andrey Katz (U. Geneva & CERN)
Ashutosh Kotwal (FNAL & Duke U.)
Tao Liu (Hong Kong U. Science & Technology)
Michelangelo Mangano (CERN)
Michael Ramsey-Musolf (U. Mass. Amherst)
Shufang Su (U. Arizona)

Neutrino Mass: From the Terrestrial Laboratory to the Cosmos

Thursday, October 15, 2015 - 9:00am to Saturday, October 17, 2015 - 2:00pm

Lederle Graduate Research Tower (LGRT) 419B, UMass Amherst

The goal of the workshop is to bring together a small group of theorists, experimentalists, and observers to address the relative implications of terrestrial, astrophysical, and cosmological probes of neutrino mass. With the prospect of order of magnitude improvements in the sensitivities of kinematic mass determinations, two-order of magnitude improvements in the lifetime sensitivity of neutrinoless double beta-decay searches, and significant advances in determinations of the sum of neutrino masses from large scale structure and the CMB, it is timely to delineate what a comparison of results from these, other laboratory and cosmological probes, and simulations might imply.

George Fuller (U. California San Diego)
Lorenzo Sorbo (U. Mass Amherst)
Michael Ramsey-Musolf (U. Mass Amherst)

LHC Searches for Long-Lived BSM Particles: Theory Meets Experiment

Thursday, November 12, 2015 - 9:00am to Saturday, November 14, 2015 - 2:00pm

Lederle Graduate Research Tower (LGRT) 419B, UMass Amherst

New long-lived particles are predicted in many beyond the standard model theories. They have been extensively searched for in collider data, most recently in Run 1 of the LHC. As the community prepares for Run 2 analysis, there is a need to examine the previous searches, identify weak or uncovered areas, and develop a coherent strategy targeting all possible scenarios. The goal of the workshop is to bring experimentalists and theorists together to discuss these issues and help improve the coverage, flexibility, and future utility of LHC searches for long-lived particles, to ensure that potential long-lived BSM particles do not escape detection at the LHC.

Stefania Gori (Perimeter Institute & U. Cincinatti)
Eva Halkiadakis (Rutgers U.)
Michele Papucci (Lawrence Berkeley National Laboratory)
Michael Ramsey-Musolf (U. Mass Amherst)
Jessie Shelton (U. Illinois Urbana-Champagne)
Stephane Willocq (U. Mass Amherst)

Upcoming Seminars

ACFI Seminar

Vivek Jain

Fri, Sep 25, 2015 - 2:30pm


ACFI Seminar

Toyoko Orimoto

Fri, Oct 23, 2015 - 2:30pm


ACFI Seminar

Jonathan Ouellet

Tue, Nov 10, 2015 - 2:30pm