3-10 August 2016
Chicago IL USA
US/Central timezone
There is a live webcast for this event.

Limits on the effective quark radius from inclusive ep scattering & contact interactions at HERA (15' + 5')

5 Aug 2016, 16:10
Chicago 7

Chicago 7

Oral Presentation Beyond the Standard Model Beyond the Standard Model


Aleksander Filip Zarnecki (University of Warsaw)


The high--precision HERA data allows searches up to TeV scales for Beyond the Standard Model contributions to electron--quark scattering. Combined H1 and ZEUS measurements of the inclusive deep inelastic cross sections in neutral and charged current $ep$ scattering are considered, corresponding to a luminosity of around 1 fb$^{-1}$. A new approach to the beyond the Standard Model analysis of the inclusive $ep$ data is presented; simultaneous fits of parton distribution functions together with contributions of ``new physics'' processes are performed. Considered are possible deviations from the Standard Model due to a finite radius of quarks, described within the quark form-factor model, or resulting from the new electron-quark interactions, in the framework of $eeqq$ contact interactions (CI). The resulting 95\% C.L. upper limit on the effective quark radius is $0.43\cdot 10^{-16}$ cm and the limits on the CI mass scales, for different CI scenarios extend up to the 10 TeV scale.

Primary authors

Aleksander Filip Zarnecki (University of Warsaw) Matthew Wing (UCL)

Presentation Materials