High pt anti-proton and meson production in cumulative pA reaction at 50 GeV/c

Oct 16, 2020, 6:30 PM
20m
Online

Online

Oral report Section 4. Relativistic nuclear physics, elementary particle physics and high-energy physics. Section 4. Relativistic nuclear physics, elementary particle physics and high-energy physics

Speaker

Dr Artem Semak (IHEP, Protvino)

Description

First data on the high pt cumulative K+/- and anti-proton particles produced at angle of 40 deg. (lab.syst.) in proton-nucleus interaction are presented. The anti-proton, pion and K-meson inclusive cross-sections in proton interactions with C, Al, Cu and W targets at 50 GeV/c were investigated. The available pt range 0.6 < pt <2.7 GeV/c exceeds free proton – nucleon kinematic limit (2.3 GeV/c for pions). It was found that within the experimental error the anti-p /pi- ratio is the same for all targets at all values of the particle momentum. Although the K+ /K- ratio is the same for all used nuclei, however it was turned out that anti-p/K depends on target. The data indicate substantial contribution of the multiparton processes in the cumulative meson and anti-p production. K/pi and anti-p/pi ratios behavior is qualitatively similar to the data from very high energy experiments like ALICE, STAR etc. The experimental data were obtained at the IHEP U-70 accelerator at SPIN setup.

Primary authors

Mr Nikolay Antonov (IHEP, Protvino) Dr Valeriy Viktorov (IHEP, Protvino) Dr Vladimir Gapienko (IHEP, Protvino) Dr Galina Gapienko (IHEP, Protvino) Mr Mikhail Ilushin (IHEP, Protvino) Dr Aleksey Prudkoglyad (IHEP, Protvino) Mr Viktor Romanovskiy (IHEP, Protvino) Dr Artem Semak (IHEP, Protvino) Mr Ilya Solodovnikov (IHEP, Protvino) Dr Mikhail Ukhanov (IHEP, Protvino)

Presentation materials