The Excess of HERA High−Q Events and Leptoquarks in a Left-Right Symmetric Preon Model
نویسندگان
چکیده
An interpretation that the HERA excess events are due to intermediate production and decay of composite leptoquarks in the left-right symmetric preon model is given. Because of the preon-line rule, expected to be valid well, the event-ratio of neutral to charged current interactions is predicted to be one. [email protected]
منابع مشابه
Contact Interactions and High-q 2 Events in E + P Collisions at Hera
We consider eeqq contact interactions as a possible origin of an excess of events above Standard Model predictions in e + p ! e + jet at high Q 2 observed by the H1 and ZEUS collaborations at HERA. The HERA data prefer chirality RL or LR contact terms and atomic physics parity violation measurements severely limit parity-odd contact terms. With equal left-right and right-left chirality interact...
متن کاملContact interactions and high - Q 2 events in e + p collisions at HERA
We consider eeqq contact interactions as a possible origin of an excess of events above Standard Model predictions in ep → e jet at high Q observed by the H1 and ZEUS collaborations at HERA. The HERA data prefer chirality RL or LR contact terms and atomic physics parity violation measurements severely limit parity-odd contact terms. With equal left-right and right-left chirality interactions at...
متن کاملLeptoquarks and vector-like strong interactions at the TeV scale
In a vector-like extension of the minimal standard model with mirror fermions leptoquarks can be bound states of fermion-mirror-fermion pairs held together by a new strong interaction at the TeV scale. The small couplings of leptoquarks to light fermion pairs arise due to mixing. The large Q event excess at HERA and also the high ET jet excess at Tevatron can potentially be explained.
متن کاملOn the Expectations for Leptoquarks in the Mass Range of O(200 GeV)
A summary is given on the experimental bounds for the couplings and masses of scalar and vector leptoquarks associated to the first fermion generation. We investigate to which extent an interpretation of the recently reported excess of events in the large x and Q range at HERA in terms of single leptoquark production is compatible with other experimental results.
متن کاملLeptoquarks: Pride and Prejudice
Attempts to understand the recent observation of an excess of events in the neutral and charged current channels at high Q at HERA has provided an excellent example of how experiments at both low and high energies can be used to simultaneously constrain scenarios which predict new physics beyond the Standard Model. In this talk I will discuss this subject from the point of view of the construct...
متن کامل