$Probing of compact baryonic configurations in nuclei in $A(p,{\bar p})X$ reactions and antiproton formation length in nuclear matter$

Probing of compact baryonic configurations in nuclei in $A(p,{\bar p})X$ reactions and antiproton formation length in nuclear matter

Inclusive cross sections $\sigma^A=Ed^3{\sigma(X,P_t^2)/d^3p}$ of antiproton and negative pion production on Be, Al, Cu and Ta targets hit by 10 GeV protons were measured at the laboratory angles of 10.5$^{\circ}$ and 59$^{\circ}$. Antiproton cross sections were obtained in both kinematically...

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Veröffentlicht in:	arXiv.org 2012-05
Hauptverfasser:	Kiselev, Yu T, Sheinkman, V A, Akindinov, A V, Chumakov, M M, Martemyanov, A N, Smirnitsky, V A, Terekhov, Yu V, E Ya Paryev
Format:	Artikel
Sprache:	eng
Schlagworte:	Aluminum Antiparticles Antiprotons Baryons Configurations Copper Hadrons Matter & antimatter Nuclear cross sections Nuclear matter Nuclear structure Nuclei (nuclear physics) Physics - High Energy Physics - Experiment Physics - Nuclear Experiment
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creator	Kiselev, Yu T Sheinkman, V A Akindinov, A V Chumakov, M M Martemyanov, A N Smirnitsky, V A Terekhov, Yu V E Ya Paryev
description	Inclusive cross sections $\sigma^A=Ed^3{\sigma(X,P_t^2)/d^3p}$ of antiproton and negative pion production on Be, Al, Cu and Ta targets hit by 10 GeV protons were measured at the laboratory angles of 10.5$^{\circ}$ and 59$^{\circ}$. Antiproton cross sections were obtained in both kinematically allowed and kinematically forbidden regions for antiproton production on a free nucleon. The antiproton cross section ratio as a function of the longitudinal variable $X$ exhibits three separate plateaus which gives evidence for the existence of compact baryon configurations in nuclei-small-distance scaled objects of nuclear structure. Comparability of the measured cross section ratios with those obtained in the inclusive electron scattering off nuclei suggests a weak antiproton absorption in nuclei. Observed behavior of the cross section ratios is interpreted in the framework of a model considering the hadron production as a fragmentation of quarks (antiquarks) into hadrons. It has been established that the antiproton formation length in nuclear matter can reach the magnitude of 4.5 fm.
doi_str_mv	10.48550/arxiv.1204.2669
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Antiproton cross sections were obtained in both kinematically allowed and kinematically forbidden regions for antiproton production on a free nucleon. The antiproton cross section ratio as a function of the longitudinal variable $X$ exhibits three separate plateaus which gives evidence for the existence of compact baryon configurations in nuclei-small-distance scaled objects of nuclear structure. Comparability of the measured cross section ratios with those obtained in the inclusive electron scattering off nuclei suggests a weak antiproton absorption in nuclei. Observed behavior of the cross section ratios is interpreted in the framework of a model considering the hadron production as a fragmentation of quarks (antiquarks) into hadrons. 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subjects	Aluminum Antiparticles Antiprotons Baryons Configurations Copper Hadrons Matter & antimatter Nuclear cross sections Nuclear matter Nuclear structure Nuclei (nuclear physics) Physics - High Energy Physics - Experiment Physics - Nuclear Experiment
title	Probing of compact baryonic configurations in nuclei in $A(p,{\bar p})X$ reactions and antiproton formation length in nuclear matter
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Probing of compact baryonic configurations in nuclei in \(A(p,{\bar p})X\) reactions and antiproton formation length in nuclear matter