ISSN:
1434-6052
Quelle:
Springer Online Journal Archives 1860-2000
Thema:
Physik
Notizen:
Abstract In the context of a measurement recently performed by the PLUTO Collaboration at PETRA, we have computed the contribution of 2-jet, 3-jet and 4-jet production processes (each involving 2 large-p T jets) in γγ* collisions to the differential cross sectiondσ/(dp T dQ 2), whereQ 2 is the γ*'s four momentum squared. It results that the total correction to the 2-jet contribution $$\left( {\gamma \gamma ^ * \to q\bar q} \right)$$ , obtained forp T andQ 2 values located in the range 2 GeV〈p T 〈6 GeV and 0.1 GeV2〈Q 2〈12 GeV2 varies rather slowly as a function of those two parameters; it ranges between 30% and 70%. The specific contribution of the higher twist term involving the process $$\gamma \gamma ^ * \to Mq\bar q$$ appears to be insignificant. The discrepancy observed between experiment and theory atQ 2≲0.3 GeV2 andp T ≃2-3.5 GeV is not explained by our results.
Materialart:
Digitale Medien
URL:
http://dx.doi.org/10.1007/BF01441358
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