Bose–Einstein correlations in hadron-pairs from lepto-production on nuclei ranging from hydrogen to xenon

Apr 12, 2016, 9:15 AM
SR1 (DESY Hamburg)


DESY Hamburg

Notkestr. 85 D-22607 Hamburg Germany
QCD and Hadronic Final States WG2 QCD and Hadronic Final States


Dr Gevorg Karyan (Yerevan Physics Institute)


Bose–Einstein correlations of like-sign charged hadrons produced in deep-inelastic electron and positron scattering are studied in the HERMES experiment using nuclear targets of 1H, 2H, 3He, 4He, N, Ne, Kr, and Xe. A Gaussian approach is used to parametrize a two-particle correlation function determined from events with at least two charged hadrons of the same sign charge. This correlation function is compared to two different empirical distributions that do not include the Bose–Einstein correlations. Clear signals of Bose–Einstein correlations for all target nuclei without a significant variation with the nuclear target mass are found. Also, no evidence for a dependence on the invariant mass W of the photon-nucleon system is found when the results are compared to those of previous experiments.

Primary author

Mr Gunar Schnell (University of the Basque Country Bilbao)

Presentation materials