Medium-induced optical effects for prompt photons
نویسندگان
چکیده
منابع مشابه
Production of Prompt Photons
After a brief review of the production dynamics of prompt single photons in hadron collisions, I summarize a new QCD calculation of the transverse momentum distribution of continuum prompt photon pairs produced by QCD subprocesses, including all-orders soft-gluon resummation valid at next-to-next-to-leading logarithmic accuracy. Resummation is necessary to obtain reliable predictions, as well a...
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The transverse momentum distribution of prompt photons coming from the very early phase of ultrarelativistic heavy ion collisions for the RHIC and LHC energies is calculated by means of perturbative QCD. We calculate the single photon cross section (A+B → γ +X) by taking into account the partonic sub processes q + q → γ + g and q + g → γ + q as well as the Bremsstrahlung corrections to those pr...
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Recent results, obtained by the H1 and ZEUS collaborations, are presented on differential cross sections , for inclusive prompt photon production in DIS and for photoproduction of prompt photons accompanied by a hadronic jet. Also presented are cross sections of normalised scaled momentum distribution of charged final state hadrons, measured by H1 in DIS ep collisions at high Q 2 in the Breit f...
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The production of prompt photons in photoproduction reactions in the ZEUS experiment is discussed. Cross sections for inclusive prompt photons and for prompt photons accompanied by jets are compared with theory, and the latter are used to determine the effective transverse momentum of the quarks in the proton.
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It is standard in theoretical neutrino astrophysics to use a broken power law approximation, based on the Band function, to describe the average photon flux of the prompt emission of Gamma-Ray Bursts. We will show that this approximation overestimates the contribution of high energy γ-rays (and underestimates low energy γ-rays). As a consequence models that rely on this approximation overestima...
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ژورنال
عنوان ژورنال: Nuclear Physics A
سال: 2020
ISSN: 0375-9474
DOI: 10.1016/j.nuclphysa.2019.121679