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A search for squarks of Rp-violating SUSY at HERA

Journal Article · · Zeitschrift fuer Physik, C (Particles and Fields)
DOI:https://doi.org/10.1007/BF02906978· OSTI ID:1410298
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Here, a search for squarks of R-parity violating supersymmetry is performed in ep collisions at HERA using H1 1994 e+ data. Direct single production of squarks of each generation by e+-quark fusion via a Yukawa coupling λ' is considered. All possible R-parity violating decays and gauge decays of the squarks are taken into account. No significant deviation from the Standard Model predictions is found in the various multi-lepton and multi-jet final states studied and exclusion limits are derived. At 95% confidence level, the existence of first generation squarks is excluded for masses up to 240 GeV for coupling values λ'≳ $$\sqrt{4πα_{em}}$$. The limits obtained are shown to be only weakly dependent on the free parameters of the Minimal Supersymmetric Standard Model. Stop squarks are excluded for masses up to 138 GeV for coupling λ'×cos θt to e+d pairs ≳ 0.1× $$\sqrt{4πα_{em}}$$, where θt is the mass mixing angle. Light stop squarks are furthermore searched for through pair production in γ-gluon fusion processes. Lastly, no signal is observed and exclusion limits are derived. Masses in the range 9 to 24.4 GeV are excluded at 95% confidence level for λ'×cosθt >10-4.
Research Organization:
Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
Sponsoring Organization:
USDOE Office of Science (SC)
Contributing Organization:
H1 Collaboration
Grant/Contract Number:
AC02-05CH11231
OSTI ID:
1410298
Journal Information:
Zeitschrift fuer Physik, C (Particles and Fields), Journal Name: Zeitschrift fuer Physik, C (Particles and Fields) Journal Issue: 2 Vol. 71; ISSN 0170-9739
Country of Publication:
United States
Language:
English

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Cited By (6)

Search for resonance decays to a ν ¯ plus jet in e + p scattering at DESY HERA journal February 2001
HERA collider physics journal October 1999
Flavor physics of leptons and dipole moments journal September 2008
HERA collider physics text January 1999
Flavour physics of leptons and dipole moments text January 2008
HERA Collider Physics text January 1999

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