dorsal/arxiv
View SchemaCoherent and Non-Coherent Double Diffractive Production of $ Q \bar {Q} $ - pairs in Collisions of Heavy Ions at High Energies
| Authors | N. M. Agababyan, S. A. Chatrchyan, A. S. Galoyan, L. L. Jenkovszky, A. I. Malakhov, G. L. Melkumov, P. I. Zarubin |
|---|---|
| Categories | |
| ArXiv ID | nucl-th/9807019 |
| URL | https://arxiv.org/abs/nucl-th/9807019 |
| Journal | Phys.Atom.Nucl. 62 (1999) 1572-1581; Yad.Fiz. 62 (1999) 1680-1692 |
Abstract
The double coherent and non-coherent diffractive production of heavy quark - antiquark pairs ($Q \bar{Q}$) in heavy ion scattering at high energies (LHC) is considered. The total and differential cross sections of these processes with the formation of $c \bar{c}$ and $b \bar{b}$ pairs in $pp$, $CaCa$ and $PbPb$ collisions are evaluated. The contribution of the considered mechanisms is a few per cent of the number of heavy quark - antiquark pairs obtained in the processes of hard (QCD) scattering, and it will be taken into account in the registration of $c$, $b$ quarks or, for instance, in the study of the heavy quarkonia suppression effects in Quark - Gluon Plasma, in the search for intermediate mass Higgs bosons and so on. It is shown that the cross section of the coherent scattering process is great enough. This makes it suitable for studying collective effects in nuclear interactions at high energies. An example of such effects is given: large values of the invariant mass of a $Q \bar{Q}$pair, $M_{Q \bar{Q}} \gsim 100$ GeV, in association with a large rapidity gap between diffractive jets $\Delta \eta > 5$.
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"abstract": "The double coherent and non-coherent diffractive production of heavy quark -\nantiquark pairs ($Q \\bar{Q}$) in heavy ion scattering at high energies (LHC) is\nconsidered. The total and differential cross sections of these processes with\nthe formation of $c \\bar{c}$ and $b \\bar{b}$ pairs in $pp$, $CaCa$ and $PbPb$\ncollisions are evaluated. The contribution of the considered mechanisms is a\nfew per cent of the number of heavy quark - antiquark pairs obtained in the\nprocesses of hard (QCD) scattering, and it will be taken into account in the\nregistration of $c$, $b$ quarks or, for instance, in the study of the heavy\nquarkonia suppression effects in Quark - Gluon Plasma, in the search for\nintermediate mass Higgs bosons and so on. It is shown that the cross section of\nthe coherent scattering process is great enough. This makes it suitable for\nstudying collective effects in nuclear interactions at high energies. An\nexample of such effects is given: large values of the invariant mass of a $Q\n\\bar{Q}$pair, $M_{Q \\bar{Q}} \\gsim 100$ GeV, in association with a large\nrapidity gap between diffractive jets $\\Delta \\eta \u003e 5$.",
"arxiv_id": "nucl-th/9807019",
"authors": [
"N. M. Agababyan",
"S. A. Chatrchyan",
"A. S. Galoyan",
"L. L. Jenkovszky",
"A. I. Malakhov",
"G. L. Melkumov",
"P. I. Zarubin"
],
"categories": [
"nucl-th",
"hep-ph"
],
"journal_ref": "Phys.Atom.Nucl. 62 (1999) 1572-1581; Yad.Fiz. 62 (1999) 1680-1692",
"title": "Coherent and Non-Coherent Double Diffractive Production of $ Q \\bar {Q} $ - pairs in Collisions of Heavy Ions at High Energies",
"url": "https://arxiv.org/abs/nucl-th/9807019"
},
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