Aug 5 – 10, 2019
Westin Harbour Castle, Toronto Canada
America/Toronto timezone

Precision electroweak physics with polarized beams at SuperKEKB

Aug 6, 2019, 5:30 PM
Parallel Session talk Collider SM & BSM (Parallel)


Michael Roney (University of Victoria)


Consideration is being given to upgrading the SuperKEKB e+e- collider with polarized electron beams, which would open a new program of precision electroweak physics at the Y(4S). These measurements include sin2 theta_W obtained via left-right asymmetry measurements of e+e- transitions to pairs of electrons, muons, taus, charm and b-quarks. The precision obtainable at SuperKEKB will match that of the LEP/SLC world average but at the centre-of-mass energy of 10.58GeV, thereby probing the neutral current couplings with unprecedented precision at a new energy scale sensitive to the running of the couplings. World average measurements of the individual neutral current vector coupling constants to b- and c-quarks and muons in particular will be substantially improved and the residual 3sigma discrepancy between the SLC ALR measurements and LEP AFBb measurements will be addressed. This paper will include a discussion of the necessary upgrades to SuperKEKB. This program opens an exciting new window in searches for physics beyond the standard model.

Primary author

Michael Roney (University of Victoria)

Presentation materials