Speaker
Dr
Alexander Borisov
(P.N.Lebedev Physical Institute of RAS, Moscow, Russia)
Description
One-year exposition data on absorption of high-energy cosmic ray hadrons with energies of tens of TeV in two-tier X-ray emulsion chamber (XREC) with large air gap ($\sim$ 2.2 m) are presented. The experiment was carried out at the Tien Shan High Mountain Research Station located at the altitude of 3340 m a.s.l. It is shown that the abnormal behavior of the hadron absorption curve, which was formerly observed in some cosmic ray experiments with deep lead calorimeters, can be accounted for by assuming a rapid growth of charmed particle production efficiency in the forward cone with increasing energy. The experimental results of both the two-storey XREC exposition and earlier expositions of homogeneous lead calorimeters are compared with simulation data calculated on the basis of a phenomenological hadronic interaction model (code FANSY 1.0) implementing quark-gluon string theoretical approaches and assuming various charm production cross section parameters. A preliminary result of charm production cross section in the forward cone at energy $E_{lab} \sim 75$ TeV is discussed. Particularly, the result is compared with those of collider experiments (RHIC and LHC) obtained for kinematic central region characterizing by relatively low pseudorapidities.
| Registration number following "ICRC2015-I/" | 0176 |
|---|---|
| Collaboration | -- not specified -- |
Primary author
Dr
Alexander Borisov
(P.N.Lebedev Physical Institute of RAS, Moscow, Russia)
Co-authors
Mr
Andrey Vargasov
(P.N.Lebedev Physical Institute of RAS, Moscow, Russia)
Dr
Arkadiy Morozov
(P.N.Lebedev Physical Institute of RAS, Moscow, Russia)
Dr
Evgeniya Kanevskaya
(P.N.Lebedev Physical Institute of RAS, Moscow, Russia)
Dr
Marina Smirnova
(P.N.Lebedev Physical Institute of RAS, Moscow, Russia)
Mr
Michael Kogan
(P.N.Lebedev Physical Institute of RAS, Moscow, Russia)
Dr
Rauf Mukhamedshin
(Institute for Nuclear Research of RAS, Moscow, Russia)
Dr
Sergey Nazarov
(M.V.Lomonosov Moscow State University, Moscow, Russia)
Dr
Sergey Pyatovsky
(P.N.Lebedev Physical Institute of RAS, Moscow, Russia)
Dr
Valentina Denisova
(P.N.Lebedev Physical Institute of RAS, Moscow, Russia)
Dr
Vitaliy Puchkov
(P.N.Lebedev Physical Institute of RAS, Moscow, Russia)
Dr
Vladimir Galkin
(M.V.Lomonosov Moscow State University, Moscow, Russia)
Dr
Zoya Guseva
(P.N.Lebedev Physical Institute of RAS, Moscow, Russia)
