Eur. Phys. J. C (2007) 51: 543-548
https://doi.org/10.1140/epjc/s10052-007-0313-8

Regular Article - Experimental Physics

Isolated lepton events at HERA: SUSY R-parity violation?

¹ Deutsches Elektronen-Synchrotron DESY, 22603, Hamburg, Germany
² Physics Department and RIPC, Chonbuk National University, Jeonju, 561-756, Korea
³ Institute of Theoretical Physics, Warsaw University, 00681, Warsaw, Poland
⁴ I. Physikalisches Institut, RWTH Aachen, Aachen, Germany
⁵ Institut für Theoretische Physik, Universität Würzburg, 97074, Würzburg, Germany
⁶ Institut für Physik, Johannes-Gutenberg-Universität Mainz, 55099, Mainz, Germany

^* e-mail: sychoi@chonbuk.ac.kr

Received: 9 January 2007
Revised: 27 February 2007
Published online: 22 June 2007

Abstract

Events with an isolated high p_T lepton, a hadron jet and missing energy as observed in the H1 experiment at HERA, are potentially associated with R-parity violation in supersymmetric theories. However, stringent kinematic constraints must be fulfilled if the production of supersymmetric particles in R-parity violating scenarios were the correct path for explaining these puzzling events. A reference point ℝ/   is specified for which these constraints are illustrated and implications of the supersymmetric interpretation for new classes of multi-lepton events are indicated.