[Theory-seminars] Theory Seminar Monday (hybrid) - Roberto Bruschini

[Zheng-Yang Li]

Dear all,

On Monday, February 17th, 2025 at 1:00PM EST, we will have a hybrid seminar given by Roberto Bruschini of Ohio State University, in person in CC L102 and on the following Zoom link:

https://jlab-org.zoomgov.com/j/1607426246?pwd=b5ptBbcdCwMTKrUuyuu3ea0L8nRF6S.1
Join our Cloud HD Video Meeting<https://jlab-org.zoomgov.com/j/1607426246?pwd=b5ptBbcdCwMTKrUuyuu3ea0L8nRF6S.1>
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Please see below for the title and abstract.

Theory Seminar: February 17th, 1pm EST (hybrid)

Speaker: Roberto Bruschini (Ohio State University)

Title: Explaining Exotic Heavy Hadrons from QCD

Abstract: Exotic hadrons are enigmatic particles that cannot be explained as mesons made of a quark-antiquark pair or baryons made of three quarks. Most of those that have been observed are hidden-heavy hadrons containing a heavy quark-antiquark pair. They are typically found near the threshold for the production of two heavy hadrons. The nature of the exotic hadrons has remained unexplained for the last 20 years, an embarrassment for the theoretical high energy physics community. In this seminar, I illustrate a relatively simple solution to the exotic hadron puzzle that is firmly based on QCD using the Born-Oppenheimer approximation. In this approximation, exotic hidden-heavy hadrons are bound states and resonances in potentials that are repulsive at short range, cross a hadron-pair threshold, and approach the threshold from below. This explains the proximity of the exotic hadrons to hadron-pair thresholds and identifies the fine tunings of QCD that are responsible for the remarkable properties of some exotic hadrons. I will also discuss implications for the gluino-hadron spectrum in models with a long-lived gluino.

See you on Monday.

Best regards,

Joe, Zheng-Yang, and Gloria
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