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Akiba, Y.; Beavis, D.; Beery, P. D.; Britt, H. C.; Budick, B.; Chasman, C.; Chen, Z.; Y., C.; Chu, Y. Y.; Cianciolo, V.; Cole, B.; Costales, J. B.; Crawford, H. J.; Cumming, J. B.; Debbe, R.; Engelage, J.; Fung, S. Y.; Gonin, M.; Gushue, S.; Hamagaki, H.; Hansén, O.; Hayano, R. S.; Hayashi, Shûichi; Homma, S.; Kaneko, H.; Kang, Joon Ho; Kaufman, S.B.; Kehoe, W. L.; Kurita, K.; Ledoux, R. J.; LeVine, M. J.; Miake, Y.; Morrison, D. P.; Morse, R. J.; Moskowitz, B.; Nagamiya, S.; Namboodiri, M.N.; Nayak, T. K.; Olness, J.W.; Parsons, C. G.; Remsberg, L. P.; Roehrich, Dieter; Rothschild, P.; Sakuraï, H.; Sangster, T.C.; Seto, R.; Soltz, R. A.; Stankus, P. W.; Steadman, S. G.; Stephans, G. S. F.; Sung, Tae–Hyun; Tanaka, Y. K.; Tannenbaum, M. J.; Thomas, J. H.; Tonse, S.; Dijk, J. H. van; Videbæk, F.; Vossnack, O.; Vutsadakis, V.; Wang, F. Q.; Wang, Y.; Wegner, H. E.; Woodruff, D. S.; Wu, Y.; Yang, X.; Zachary, D.; Zajc, W. A.

doi:10.1103/physrevlett.76.2021

Cited by 26 publications

(11 citation statements)

References 15 publications

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“…This, however, does not contradict the earlier observations [5] because in Ref. [7] the top 7% of the highest-multiplicity events were clubbed together and no multiplicity dependence of the mass was reported. In the earlier work [5], the shift in the mass was seen when the TMA cut was applied at 2%.…”

Section: Introductionmentioning

confidence: 53%

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Apparent and Actual Shifts in Mass and Width of ϕ Mesons Produced in Heavy-Ion Collisions

Bhalerao

Gupta

1997

Mod. Phys. Lett. A

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We present a method of analyzing invariant-mass spectra of kaon pairs resulting from decay of φ mesons produced in high-energy heavy-ion collisions.It can be used to extract the shifts in the mass and the width (∆M and ∆Γ) of the φ mesons when they are inside the dense matter formed in these collisions. We illustrate our method with the help of available preliminary data.Extracted values of ∆M and ∆Γ are significantly larger than those obtained with an earlier method. Our results are consistent with the experimentally observed p T dependence of the mass shift. Finally, we present a phenomenological relation between ∆M and ∆Γ. It provides a useful constraint on theories which predict the values of these two quantities.1

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Section: Introductionmentioning

confidence: 53%

“…In a more recent publication [7], the E-802 collaboration has reported no shift in the mass and the width of the φ meson. This, however, does not contradict the earlier observations [5] because in Ref.…”

Section: Introductionmentioning

confidence: 95%

Apparent and Actual Shifts in Mass and Width of ϕ Mesons Produced in Heavy-Ion Collisions

Bhalerao

Gupta

1997

Mod. Phys. Lett. A

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“…Phi mesons have also been measured recently in heavy-ion collisions at AGS energies from the invariant mass distribution of kaon-antikaon pairs [12], and their mass and width are found to be consistent with that in free space. This is not surprising as these kaonantikaon pairs are from the decay of phi mesons at freeze out when their properties are the same as in free space.…”

mentioning

confidence: 73%

Phi meson production cross sections in pion-baryon and baryon-baryon interactions

Chung

1997

Physics Letters B

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Phi meson production in pion-baryon and baryon-baryon interactions near the production threshold is studied in a boson-exchange model. Parameters in this model are either taken from the Bonn model for the nucleon-nucleon potential or determined from the measured phi meson decay width and the experimental data for the reactions π − p→φn and pp→ppφ. The isospinaveraged cross sections for the reactions πN →φN , π∆→φN , N N →N N φ, which are needed in transport models to study phi meson production in heavyion collisions at subthreshold energies, have been evaluated. For the reactions N ∆→N N φ and ∆∆→N N φ, which become singular when the exchanged pion is on-shell, the Peierls method is used to calculate their cross sections. We find that the cross section for the reaction πN →φN is much larger than the other cross sections.

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“…The reactions (2) are OZI allowed, so we win in cross sections compared to πN → φN a factor of the order of 75, cf. (1). We lose, however, in the smaller concentration of hyperons and anti-kaons compared to nucleons and pions, respectively.…”

Section: Introductionmentioning

confidence: 94%

“…Since the OZI suppression weakens the φ production only by the ordinary hadronic matter and is lifted in the quark-gluon medium, the strong, of the order indicated in (1), enhancement of the φ yield was proposed in [24] as a signal of the quark-gluon plasma formation. An enhancement of the φ yield was indeed observed in experiments albeit to a lesser degree: the ratio of the φ yield in a nucleus-nucleus collision normalized by the number of participating nucleon pairs to the φ yield in a proton-proton collision lies between 3 and 4 for AGS/SPS energies [2,7].…”

Section: Introductionmentioning

confidence: 99%

Catalytic φ meson production in heavy-ion collisions

Kolomeitsev

Tomášik

2009

J. Phys. G: Nucl. Part. Phys.

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The phi meson production on hyperons, πY → φY and anti-kaons KN → φY is argued to be a new efficient source of phi mesons in a nucleus-nucleus collision. These reactions are not suppressed according to Okubo-Zweig-Izuka rule in contrast to the processes with non-strange particles in the entrance channels, πB and BB with B = N, ∆. A rough estimate of the cross sections within a simple hadronic model shows that the cross sections of πY → φY andKN → φY reactions can exceed that of the πN → φN reaction by factors 50 and 60, respectively. In the hadrochemical model for nucleus-nucleus collisions at SIS and lower AGS energies we calculate the evolution of strange particle populations and phi meson production rate due to the new processes. It is found that the catalytic reactions can be operative if the maximal temperature in nucleus-nucleus collisions is larger than 130 MeV and the collision time is larger than 10 fm. A possible influence of the catalytic reactions on the centrality dependence of the φ yield at AGS energies and the φ rapidity distributions at SPS energies is discussed.PACS numbers: 25.75.Dw,25.80.Nv,25.80.Pw

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Production ofφMesons in CentralS28i+

Cited by 26 publications

References 15 publications

Apparent and Actual Shifts in Mass and Width of ϕ Mesons Produced in Heavy-Ion Collisions

Apparent and Actual Shifts in Mass and Width of ϕ Mesons Produced in Heavy-Ion Collisions

Phi meson production cross sections in pion-baryon and baryon-baryon interactions

Catalytic φ meson production in heavy-ion collisions

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