Journal article
Comparison of ZEUS data with standard model predictions for e(+)p->e(+)X scattering at high x and Q(2)
European Physical Journal C, Vol.74(2), pp.207-220
Apr/1997
Abstract
Using the ZEUS detector at HERA, we have studied the reaction e(+)p --> e(+)X for Q(2) > 5000 GeV2 with a 20.1 pb(-1) data sample collected during the years 1993 to 1996. For Q(2) below 15000 GeV2, the data are in good agreement with Standard Model expectations. For Q(2) > 35000 GeV2. two events are observed while 0.145 +/- 0.013 events are expected, A statistical analysis of a large ensemble of simulated Standard Model experiments indicates that with probability 6.0%, an excess at least as unlikely as that observed would occur above some Q(2) cut. For x > 0.55 and y > 0.75, four events are observed where 0.91 +/- 0.08 events are expected, A statistical analysis of the two-dimensional distribution of the events in x and y yields a probability of 0.72% for the region x > 0.55 and y > 0.25 and a probability of 7.8% for the entire Q(2) > 5000 GeV2 data sample. The observed excess above Standard Model expectations is particularly interesting because it occurs in a previously unexplored kinematic region.
Details
- Title
- Comparison of ZEUS data with standard model predictions for e(+)p->e(+)X scattering at high x and Q(2)
- Creators
- J Breitweg (null)M Derrick (null)D Krakauer (null)S Magill (null)D Mikunas (null)B Musgrave (null)J Repond (null)R Stanek (null)RL Talaga (null)R Yoshida (null)H Zhang (null)MCK Mattingly (null)F Anselmo (null)P Antonioli (null)G Bari (null)M Basile (null)L Bellagamba (null)D Boscherini (null)A Bruni (null)
- Resource Type
- Journal article
- Publication Details
- European Physical Journal C, Vol.74(2), pp.207-220; Apr/1997
- Number of pages
- 14
- Language
- English
- DOI
- https://doi.org/10.1007/s002880050384
- Scientific Unit
- The Weizmann Institute of Science
- Record Identifier
- 993264501803596
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