Average charged particle multiplicity and topological cross sections in and pp interactions

Ammosov, V. V.; Boitsov, V.N.; Ermolov, P.; Fenyuk, A. B.; Gorichev, P.A.; Kistenev, E.; Klimenko, Stanislav; Manyukov, B.A.; Moiseev, A.M.; Sulyaev, R.M.; Tarasevich, S. V.; Vorobjev, A. P.; Blumenfeld, H.; Derré, J.; Granet, P.; Jabiol, M. A.; Lévêque, A.; Loret, M.; Pauli, E.; Pons, Y.; Prevost, J.; Scheuer, J.C.; Boratav, M.; Laberrigue, J.; Nguyen, H. K.; Orenstein, S.

doi:10.1016/0370-2693(72)90121-9

Cited by 140 publications

(20 citation statements)

References 8 publications

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“…Before beginning of the "Thermalization" project, our SVD-2 Collaboration has found out that the Monte Carlo simulation underestimates the experimental data of the Mirabelle Collaboration [19] for topological cross section at the maximum value of the measured multiplicity, n ch = 18, two orders in pp interactions at 70 GeV proton beam [20]. The phenomenological models gave them the different predictions too.…”

Section: Gdm and Hadron Interactionsmentioning

confidence: 99%

Gluon dominance model

Кокоулина

Kutov²

2017

EPJ Web Conf.

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Abstract. Study of multi-particle production has longer than the semi-centennial history. As it is known, with the growth of energy of accelerators, the new channels of reaction are being opened, the average number of secondary particles is increasing. Physicists are able to accelerate stable particles, such as electrons, positrons, protons, antiprotons, ions (both light and heavy). Rarely, they accelerate kaons and pions. The obtained experimental material stimulates the development of the different theoretical approaches. Since appearance of the modern theory of strong interactions, quantum chromodynamics (QCD), our understanding of multi-particle production is advanced significantly. The language of quarks and gluons is basic one at the explanation of observable phenomena. This review is devoted to the history of appearance and the following development of the gluon dominance model. This model is based on the pQCD and the phenomenological description of the hadronization stage. It permits to describe multiplicity distributions both for lepton and hadron interactions, especially in the high multiplicity region.

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Section: Gdm and Hadron Interactionsmentioning

confidence: 99%

Gluon dominance model

Кокоулина

Kutov²

2017

EPJ Web Conf.

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“…The mean number of secondary particles for pp interactions at 50 GeV counts about 5 charged and 2 neutral particles, basically, it is pions [6]. We have registered and studied events with the multiplicity more than mean multiplicity.…”

Section: Introductionmentioning

confidence: 99%

Search for collective phenomena in hadron interactions

Кокоулина¹,

Kutov²,

Никитин³

et al. 2011

Proceedings of the 40th International Symposium on Multiparticle Dynamics

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Experimental studies of collective phenomena are carried out on U-70 accelerator in Protvino. These phenomena can be discovered since the high parton density can form in the high multiplicity region. The collective behavior of secondary particles can manifest in the BoseEinstein condensation of pions, Vavilov-Cherenkov gluon radiation, excess of soft photon yield and other unique phenomena. The revealed peaks in the angular distribution are interpreted as the gluon radiation. The search for Bose-Einstein condensation is continued. The gluon dominance model has shown a good agreement with the multiplicity distribution at high multiplicity and confirmed the guark-gluon medium formation.

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“…So, to find them out, it is necessary either to increase the set of statistical data or to include into setup the trigger device to suppress registration of small multiplicity events. The chamber method did not allow increasing considerably quantity of scanning events and to observe HM events [2].…”

Section: Introductionmentioning

confidence: 99%

“…In the 1970s, physicists thought about searching for HM events during carrying-out of the experiment at the Mirabelle bubble chamber ICPPA 2017 [2] to understand how essential part of energy of colliding particles is transformed into secondaries. It is known that HM events are extreme rare ones.…”

Section: Introductionmentioning

confidence: 99%

Search for Collective Phenomena in High Multiplicity Events at Nuclotron and U-70

Avdeichikov¹,

Bogdanova²,

Borzunov³

et al. 2018

KEn

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More than ten-year experimental search for collective phenomena in high multiplicity events has been carried out at the Laboratory of high energy physics at JINR. We present main results, which have been received at the U-70 accelerator (IHEP, Protvino) in the proton collisions and at Nuclotron ( JINR, Dubna) in the nuclear interactions. For interactions, topological cross sections have been gone three orders down and achieved KNO-scaling variable ( / ) 4.5. Probably, the tail of high multiplicity distribution stipulates gluon splitting. In the region of high multiplicity, the formation of pions is predominant. Some collective phenomena are predicted in this region. Using charged multiplicity data, we could restore total (sum of charged and neutral particles) multiplicity and have implemented unique research for fluctuations of the neutral particle number at the given total multiplicity. The revealed growth of scaled variance may indicate the pion (Bose-Einstein) condensate formation. The excess of soft photon yield at interactions of the Nuclotron beams (d, Li and C) with a carbon target has been confirmed. This can be connected with the pion condensate formation. Currently, we prepare two-shoulder electromagnetic calorimeter to carry out experimental studies at BM@N setup and plan to take part in new experiments on heavy ion collisions at Nuclotron.

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Average charged particle multiplicity and topological cross sections in and pp interactions

Cited by 140 publications

References 8 publications

Gluon dominance model

Gluon dominance model

Search for collective phenomena in hadron interactions

Search for Collective Phenomena in High Multiplicity Events at Nuclotron and U-70

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