BEGIN:VCALENDAR
VERSION:2.0
PRODID:icalendar-ruby
CALSCALE:GREGORIAN
X-WR-CALNAME:LEPP Theory Seminar: Robert Lasenby\, Perimeter
X-WR-TIMEZONE:Eastern Time (US & Canada)
BEGIN:VEVENT
DTSTAMP:20260910T071731Z
UID:tag:localist.com\,2008:EventInstance_2658962
DTSTART:20170224T173000Z
DTEND:20170224T183000Z
DESCRIPTION:New bounds on light bosons - from stars to colliders\n\nAbstrac
 t: Many models of beyond-Standard-Model physics include new light\, weakly
 -coupled particles\, and some of the best constraints on such particles co
 me from stellar energy loss bounds. I will discuss how\, for new light par
 ticles which gain an effective in-medium mixing with the photon (or other 
 SM particle)\, plasma effects can result in parametrically different therm
 al production rates to those obtained from a naive calculation. This can r
 esult in orders-of-magnitude improvements in sensitivity to the couplings 
 of light scalars\, and qualitative changes to the sensitivity for light ve
 ctors. \n\nCollider experiments can also provide strong bounds\, and futur
 e discovery potential\, for light weakly-coupled states. In the case of ne
 w light vectors\, there are generically (energy/vector mass)^2 enhanced pr
 oduction processes for the longitudinal mode\, which allow high-energy exp
 eriments to act as powerful probes of light vectors. I’ll discuss such e
 xperimental probes\, and show how they apply even in cases where the vecto
 r couples to an anomalous but tree-level conserved current such as baryon 
 number.
GEO:42.449699;-76.481903
LOCATION:Physical Sciences Building\, 401
SUMMARY:LEPP Theory Seminar: Robert Lasenby\, Perimeter
URL;VALUE=URI:https://events.cornell.edu/event/lepp_theory_seminar_robert_l
 asenby_perimeter
CATEGORIES:Seminar
END:VEVENT
END:VCALENDAR