Search for contact interactions in e±p collisions at HERA

• Verfasst von: Aaron, Francisc Dionisie [VerfasserIn]
• Verfasst von: Pirumov, Hayk [VerfasserIn]
• Verfasst von: Sauter, Michel David [VerfasserIn]
• Verfasst von: Schöning, André [VerfasserIn]
• Verfasst von: Schultz-Coulon, Hans-Christian [VerfasserIn]
• Titel: Search for contact interactions in e±p collisions at HERA
• Körperschaft: H1 Collaboration [VerfasserIn]
• Verf.angabe: H1 Collaboration*
• E-Jahr: 2011
• Jahr: 4 October 2011
• Umfang: 7 S.
• Fussnoten: Im Titel sind die Zeichen + und - hochgestellt ; *H1 Collaboration: F.D. Aaron, H. Pirumov, M. Sauter, A. Schoening, H.-C. Schultz-Coulon [und 198 weitere Personen] ; Gesehen am 22.02.2022
• Titel Quelle: Enthalten in: Physics letters / B
• Ort Quelle: Amsterdam : North-Holland Publ., 1967
• Jahr Quelle: 2011
• Band/Heft Quelle: 705(2011), 1, Seite 52-58
• ISSN Quelle: 1873-2445
• DOI: doi:10.1016/j.physletb.2011.09.109
• Datenträger: Online-Ressource
• Sprache: eng
• K10plus-PPN: 1793510296

Abstract

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 e±p collisions at HERA. The differential cross section dσ/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 significant 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 Λ are set in the range 3.6 TeV to 7.2 TeV. Leptoquarks with masses MLQ and couplings λ are constrained to MLQ/λ>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⋅10−18 m is determined.