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Jul 4 – 11, 2012
Melbourne Convention and Exhibition Centre
Australia/Melbourne timezone
ICHEP2012 - 36th International Conference for High Energy Physics

Search for Contact Interactions in e^{\pm}p Collisions at HERA

Jul 7, 2012, 5:20 PM
15m
Room 219 (Melbourne Convention and Exhibition Centre)

Room 219

Melbourne Convention and Exhibition Centre

Melbourne Australia
Board: 18
Parallel Sessions Track 3 - BSM - Non-SUSY Exotics Room 219 - BSM - Non-SUSY - TR3

Speaker

Eram Syed Rizvi (Queen Mary, University of London)

Description

A search for physics beyond the Standard Model in neutral current deep inelastic scattering at high negative four-momentum transfer squared Q2 is performed in ep collisions at HERA. The differential cross section d\sigma/dQ2 , measured using the full H1 data sample corresponding to an integrated luminosity of 446 pb-1, is compared to the Standard Model prediction. No signicant deviation is observed. Limits on various models predicting new phenomena at high Q2 are derived. For general four-fermion eeqq contact interaction models, lower limits on the compositeness scale Lambda are set in the range 3:6 TeV to 7:2 TeV. Leptoquarks with masses MLQ and couplings lambda are constrained to M_LQ/lambda > 0:41-1.86 TeV and limits on squarks in R-parity violating supersymmetric models are derived. A lower limit on the gravitational scale in (4+n) dimensions of MS > 0:9 TeV is established for low-scale quantum gravity effects in models with large extra dimensions. For the light quark radius an upper bound of Rq < 0:65 x10^-18 m is determined.

Primary author

Eram Syed Rizvi (Queen Mary, University of London)

Presentation materials