[Jlabsa_gs] Pizza Seminar - Wednesday, February 21, 2018 - A Message From Lorelei Carlson

[Jodi Patient]

Jefferson Lab's Graduate Student and Post-Doc Association Wiki:
  https://gspda.jlab.org/wiki/index.php/Main_Page

               Please RSVP to:  patient at jlab.org by COB on February 19, 2018


                                 Wednesday, February 21, 2018

                                         ***F113***

                                        12:00-1:00 pm

"Test of lepton universality and search for dark bosons with TREK/E36 at J-PARC"

          
                                        Bishoy Dongwi 

                                     Hampton University

        
                                   
Abstract:
Fueled by the LHCb measurements of R(D) and R(D∗) mesons, lepton non-universality has
become the flagship for beyond SM searches.  The TREK/E36 (E36) experiment conducted at
J-PARC in Japan aims to test lepton universality in the RK = Γ(Ke2)/Γ(Kμ2) ratio, utilizing
a scintillating fiber target to stop a beam of up to 1.2 million K+ per spill.  K+ decay products
were detected with MWPCs and a large-acceptance toroidal spectrometer capable of analyzing
charged particles with high resolution, combined with a CsI(Tl) photon calorimeter having a
solid angle covering 75% of 4π and particle identification systems.  Since the SM the ratio of 
leptonic K+ decays is very precise, any observed deviation from the SM prediction would provide
evidence of non-universality of lepton couplings and provide a clear indication of New Physics
beyond the SM. The status of the data analysis will be presented.

This work has been supported by DOE awards DE-SC0003884 and DE-SC0013941 in the US,
NSERC in Canada, and Kaken-hi in Japan.