Direct Measurement of the Chudakov Effect | Zendy

T. Virkus | Zendy; Heine Thomsen | Zendy; E. Uggerhøj | Zendy; S. Ballestrero | Zendy; P. Sona | Zendy; A. Mangiarotti | Zendy; T. J. Ketel | Zendy; A. Dizdar | Zendy; S. Kartal | Zendy; C. Pagliarone | Zendy

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Direct Measurement of the Chudakov Effect

Author(s) -

T. Virkus,

Heine Thomsen,

E. Uggerhøj,

S. Ballestrero,

P. Sona,

A. Mangiarotti,

T. J. Ketel,

A. Dizdar,

S. Kartal,

C. Pagliarone

Publication year - 2008

Publication title -

physical review letters

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 3.688

H-Index - 673

eISSN - 1079-7114

pISSN - 0031-9007

DOI - 10.1103/physrevlett.100.164802

Subject(s) - physics , photon , detector , measure (data warehouse) , vertex (graph theory) , energy (signal processing) , function (biology) , photon energy , nuclear physics , statistical physics , optics , quantum mechanics , graph , computer science , data mining , evolutionary biology , biology , theoretical computer science

Experimental results for the restricted energy loss of pairs created from 1–178 GeV photons in a thin Au target and subsequently passing a CCD detector are presented. It is shown that pairs—when detected close to the creation vertex—suffer a reduced energy loss due to the internal screening of the charges constituting the pair. Furthermore, the ability to measure directly the energy of the pair by calorimetry enables a comparison with theory as a function of energy. The observed phenomenon is in good qualitative agreement with general expectations from the Chudakov effect but indicates a quantitative disagreement with either of two mutually disagreeing theories

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