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          Institute: MPI für Physik     Collection: MPI für Physik     Display Documents



ID: 543217.0, MPI für Physik / MPI für Physik
Search for new physics in e^\pm q contact interactions at HERA
Authors:H1 Collaboration; Adloff, C.; et al.
Date of Publication (YYYY-MM-DD):2003
Title of Journal:Physics Letters B
Journal Abbrev.:Phys.Lett.B
Issue / Number:568
Start Page:35
End Page:47
Audience:Not Specified
Intended Educational Use:No
Abstract / Description:Deep-inelastic e^\pm p scattering at high squared momentum transfer Q^2 up to 30000 GeV^2 is used to search for eq contact interactions associated to scales far beyond the HERA centre of mass energy. The neutral current cross section measurements d sigma / d Q^2, corresponding to integrated luminosities of 16.4 pb^-1 of e^- p data and 100.8 pb^-1 of e^+ p data, are well described by the Standard Model and are analysed to set constraints on new phenomena. For conventional contact interactions lower limits are set on compositeness scales Lambda ranging between 1.6 - 5.5 TeV. Couplings and masses of leptoquarks and squarks in R-parity violating supersymmetry are constrained to M / lambda > 0.3 - 1.4 TeV. A search for low scale quantum gravity effects in models with large extra dimensions provides limits on the effective Planck scale of M_S > 0.8 TeV. A form factor analysis yields a bound on the radius of light quarks of R_q < 1.0 x 10^-18 m.
Classification / Thesaurus:H1
Comment of the Author/Creator:15 pages, 5 figures and 5 tables
External Publication Status:published
Document Type:Article
Communicated by:N.N.
Affiliations:MPI für Physik
Identifiers:LOCALID:MPP-2003-166
URL:http://www.slac.stanford.edu/spires/find/hep/www?r...
URL:http://arXiv.org/abs/hep-ex/0305015
URL:http://publications.mppmu.mpg.de/?action=search&mp...
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