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VERSION:2.0
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X-WR-CALNAME:LNS Lunchtime Seminar 
X-WR-TIMEZONE:Eastern Time (US & Canada)
BEGIN:VEVENT
DTSTAMP:20260514T193336Z
UID:tag:localist.com\,2008:EventInstance_44375273795019
DTSTART:20231003T160000Z
DTEND:20231004T050000Z
DESCRIPTION:Omer Penek \n\nCatching Fundamental Physics with Borexino and F
 AIR - From Proton Fusion in the Sun to Proton Collisions in the Lab\n\nAbs
 tract:\nSearching for solutions to fundamental physics questions is a broa
 d and challenging task. Many experiments and profound models are needed in
  order to make a step towards understanding the unknowns of our Universe. 
 Here\, important physics processes are given by proton-proton and proton-n
 ucleus reactions since hydrogen is the most abundant element of visible ma
 tter in the cosmos.\n\nAt energies around keV and under certain thermodyna
 mical conditions\, two protons can undergo nuclear fusion to create a deut
 eron. One of the most important natural sources of nuclear fusion is the S
 un emitting neutrinos from its core with _MeV endpoint energies. Borexino\
 , a radiopure liquid scintillator detector with 280 tonnes of active mass\
 , located at the Laboratori Nazionali del Gran Sasso in Italy operated bet
 ween May 2007 until October 2021 and gave significant contributions to the
  measurement of low-energy solar neutrinos from the dominant proton-proton
  (pp) chain (branching fraction _99%) and the sub-dominant Carbon-Nitrogen
 -Oxygen (CNO) cycle (branching fraction _1%). Neutrinos from the CNO cycle
  have been measured by Borexino with a high statistical significance for t
 he first time in 2020 after being predicted by Bethe and Weizacker more th
 an 80 years ago.\n\nWhen going to higher energies at several GeV\, proton-
 proton collisions enable access to subnuclear scales. For precision analys
 es\, fixed target experiments become relevant. As an example\, the planned
  Facility for Anti-proton and Ion Research (FAIR) in Darmstadt\, Germany s
 erves as an example of a facility pursuing such a proton-on-proton program
 . In this context\, charm productions can be studied by measuring dilepton
 ic final states\, which are e.g. relevant for the investigation of the pro
 ton structure.\n\nMotivated by the research I was involved in over the pas
 t years\, in this talk\, I will present recent achievements of Borexino fo
 cusing on its precision spectroscopy of pp chain and CNO cycle solar neutr
 inos including novel techniques in the spectral analysis. Moreover\, I wil
 l give an overview of the physics potential at FAIR with a focus on charm 
 production including the advantages of kinematic methods. I will conclude 
 with a brief discussion on building a bridge between (astro-)neutrino phys
 ics and hadron physics.
LOCATION:\, Kolker Room (26-414)
SUMMARY:LNS Lunchtime Seminar 
URL;VALUE=URI:https://calendar.mit.edu/event/lns_lunchtime_seminar_1870
CATEGORIES:Conferences/Seminars/Lectures
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