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HERA Groups Find Excess Deep Inelastice+pScattering Events

 

作者: Gloria B. Lubkin,  

 

期刊: Physics Today  (AIP Available online 1997)
卷期: Volume 50, issue 4  

页码: 18-19

 

ISSN:0031-9228

 

年代: 1997

 

DOI:10.1063/1.881753

 

出版商: AIP

 

数据来源: AIP

 

摘要:

Over the last four years, the H1 and ZEUS detector groups at DESY in Hamburg have been studying the interaction of 27.5 GeV positrons colliding with 820 GeV protons in the Hadron‐Electron Ring Accelerator (HERA). The events at the highest 4‐momentum transfer explore a new kinematic regime, down to10−16 cm.As early as 1994, some deep inelastic scattering events at very high momentum transfer were seen. Late last year, rumors became rampant in labs outside DESY that the H1 and ZEUS detectors were finding leptoquarks. Both groups independently analyzed their data sample of high‐energy deep inelastic scattering collected from 1994 to 1996. The events they found have the signature of deep inelastic scattering—tne positron is scattered by a quark inside the proton through a large angle, almost completely back the way it came, and the struck quark generates a high‐energy jet of hadrons.

 

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