Study of charm production in the forward cone at energy ELab ∼ 75 TeV with a two-storey X-ray emulsion chamber exposed at, mountain altitudes

Borisov A.S.; Chubenko A.P.; Denisova V.G.; Galkin V.I.; Guseva Z.M.; Kanevskaya E.A.; Kogan M.G.; Kulikov V.N.; Morozov A.E.; Mukhamedshin 
R.A.; Puchkov V.S.; Nazarov S.I.; Pyatovsky S.E.; Shoziyoev 
G.P.; Smirnova M.D.; Vargasov A.V.

doi:10.1051/epjconf/20159910004

EPJ Web of Conferences (Jan 2015)

Study of charm production in the forward cone at energy ELab ∼ 75 TeV with a two-storey X-ray emulsion chamber exposed at, mountain altitudes

Borisov A.S.,
Chubenko A.P.,
Denisova V.G.,
Galkin V.I.,
Guseva Z.M.,
Kanevskaya E.A.,
Kogan M.G.,
Kulikov V.N.,
Morozov A.E.,
Mukhamedshin R.A.,
Puchkov V.S.,
Nazarov S.I.,
Pyatovsky S.E.,
Shoziyoev G.P.,
Smirnova M.D.,
Vargasov A.V.

Affiliations

Borisov A.S.: P.N.Lebedev Physical Institute of the Russian Academy of Sciences
Chubenko A.P.: P.N.Lebedev Physical Institute of the Russian Academy of Sciences
Denisova V.G.: P.N.Lebedev Physical Institute of the Russian Academy of Sciences
Galkin V.I.: Institute of Nuclear Physics, M.V. Lomonosov Moscow State University
Guseva Z.M.: P.N.Lebedev Physical Institute of the Russian Academy of Sciences
Kanevskaya E.A.: P.N.Lebedev Physical Institute of the Russian Academy of Sciences
Kogan M.G.: P.N.Lebedev Physical Institute of the Russian Academy of Sciences
Kulikov V.N.: TSNIIMash, Moscow region, Korolyev
Morozov A.E.: P.N.Lebedev Physical Institute of the Russian Academy of Sciences
Mukhamedshin R.A.: Institute for Nuclear Research of the Russian Academy of Sciences
Puchkov V.S.: P.N.Lebedev Physical Institute of the Russian Academy of Sciences
Nazarov S.I.: Institute of Nuclear Physics, M.V. Lomonosov Moscow State University
Pyatovsky S.E.: P.N.Lebedev Physical Institute of the Russian Academy of Sciences
Shoziyoev G.P.: P.N.Lebedev Physical Institute of the Russian Academy of Sciences
Smirnova M.D.: P.N.Lebedev Physical Institute of the Russian Academy of Sciences
Vargasov A.V.: P.N.Lebedev Physical Institute of the Russian Academy of Sciences

DOI: https://doi.org/10.1051/epjconf/20159910004
Journal volume & issue: Vol. 99
p. 10004

Abstract

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The origin of the cosmic ray hadron excess observed in a deep uniform lead X-ray emulsion chamber (XREC) at depths larger than 70 radiation lengths is analyzed. We present preliminary experimental data on the absorption of cosmic ray hadrons in the two-storey XREC with a large air gap exposed at the Tien Shan mountains. The design of the chamber was especially invented to prove the hypothesis on a substantial increase of the charm particle production cross section with energy at ELab ∼ 75 TeV as the main source of the darkness spot excess observed on X-ray films. Experimental data obtained with both a 2-storey XREC and a deep uniform XREC are compared with simulation results calculated with the FANSY 1.0 model. The comparison reveals a qualitative agreement between experimental and simulated data under the assumption of high values of charm particle production cross section at ELab ∼ 75 TeV in the forward kinematic region at xLab > 0.1.

Published in EPJ Web of Conferences

ISSN: 2100-014X (Online)
Publisher: EDP Sciences
Country of publisher: France
LCC subjects: Science: Physics
Website: http://www.epj-conferences.org/

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