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V. Arefiev

Joint Institute for Nuclear Research

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Featured researches published by V. Arefiev.

Physical Review Letters | 1998

Centrality Dependence of Neutral Pion Production in 158A GeV

M. M. Aggarwal; A. Agnihotri; Z. Ahammed; A.L.S. Angelis; V. Antonenko; V. Arefiev; V. Astakhov; V. Avdeitchikov; T. C. Awes; P.V.K.S. Baba; S.K. Badyal; A. Baldine; L. Barabach; C. Barlag; S. Bathe; B. Batiounia; T. Bernier; K.B. Bhalla; V.S. Bhatia; C. Blume; R. Bock; E.-M. Bohne; Z.K. Böröcz; D. Bucher; A. Buijs; H. Büsching; L. Carlén; V. Chalyshev; S. Chattopadhyay; R. Cherbatchev

The production of neutral pions in 158AGeV Pb+Pb collisions has been studied in the WA98 experiment at the CERN SPS. Transverse momentum spectra are studied for the range 0.3 GeV/c<mT-m0<4.0 GeV/c. The results for central collisions are compared to various models. The centrality dependence of the neutral pion spectral shape and yield is investigated. An invariance of the spectral shape and a simple scaling of the yield with the number of participating nucleons is observed for centralities with greater than about 30 participating nucleons which is most naturally explained by assuming an equilibrated system.

Physics Letters B | 1999

^{208}

Abstract The multiplicity of inclusive photons has been measured on an event-by-event basis for 158· A GeV Pb induced reactions on Ni, Nb, and Pb targets. The systematics of the pseudorapidity densities at midrapidity ( ρ max ) and the width of the pseudorapidity distributions have been studied for varying centralities for these collisions. A power law fit to the photon yield as a function of the number of participating nucleons gives a value of 1.12±0.03 for the exponent. The mean transverse momentum, 〈 p T 〉, of photons determined from the ratio of the measured electromagnetic transverse energy and photon multiplicity, remains almost constant with increasing ρ max . Results are compared with model predictions.

European Physical Journal A | 1984

Pb+

A. N. Aleev; V. Arefiev; V. P. Balandin; V. K. Berdyshev; V. K. Birulev; V. D. Cholakov; A. S. Chvyrov; I. I. Evsikov; T. S. Grigalashvili; B. Guskov; I. M. Ivanchenko; I. N. Kakurin; M. N. Kapishin; N. Karpenko; D. A. Kirillov; I. G. Kosarev; V. R. Krastev; N. A. Kuz'min; B. A. Kulakov; M. F. Likhachev; A. L. Lyubimov; A. N. Maksimov; P. V. Moisenz; A. Morozov; S. Nemecek; Nguyen Mong Zao; V. V. Pal'chik; A. V. Pose; L. V. Sil'vestrov; V. E. Simonov

AbstractThe inclusive production of charmed baryonsΛc+ by 40–70 GeV neutrons on carbon has been observed. The decays

European Physical Journal C | 1984

^{208}

A. N. Aleev; V. Arefiev; V. P. Balandin; V. K. Birulev; A. S. Chvyrov; V. D. Cholakov; T. S. Grigalashvili; B. Guskov; I. M. Ivanchenko; N. Karpenko; D. A. Kirillov; I. G. Kosarev; V. R. Krastev; N. A. Kuz'min; B. A. Kulakov; M. F. Likhachev; A. L. Lyubimov; A. N. Maksimov; A. Morozov; A. V. Pose; L. V. Sil'vestrov; V. E. Simonov; L. A. Slepets; P. T. Todorov; R. K. Trayanov; K. Hiller; H. E. Ryseck; H. Nowak; A. Belousov; A. Fomenko

Physics Letters B | 1999

Pb Collisions

\Lambda _c^ + \to \bar K^0 p\pi ^ + \pi ^ -

European Physical Journal A | 1988

Systematics of inclusive photon production in 158-A-GeV Pb induced reactions on Ni, Nb, and Pb targets

A. N. Aleev; V. Arefiev; V. P. Balandin; V. K. Berdyshev; V. K. Birulev; A. S. Chvyrov; I. I. Evsikov; T. S. Grigalashvili; B. Guskov; K. Hiller; I. M. Ivanchenko; I. N. Kakurin; M. N. Kapishin; N. Karpenko; D. A. Kirillov; I. G. Kosarev; V. R. Krastev; N. A. Kus'min; M. F. Likhachev; A. L. Lyubimov; A. N. Maksimov; P. Moisenz; A. Morozov; V. V. Pal'chik; A. V. Pose; A. Prokes; V. E. Simonov; L. A. Slepets; M. Smizanska; G. G. Takhtamyshev

European Physical Journal C | 1990

TheΛ c + production by 40–70 GeV neutrons on carbon

A. N. Aleev; V. Arefiev; V. P. Balandin; V. K. Berdyshev; V. K. Birulev; A. S. Chvyrov; I. I. Evsikov; T. S. Grigalashvili; B. Guskov; I. M. Ivanchenko; M. N. Kapishin; N. Karpenko; D. A. Kirillov; I. G. Kosarev; N. A. Kuz'min; M. F. Likhachev; A. L. Lyubimov; A. N. Maksimov; P. Moisenz; A. Morozov; V. V. Pal'chik; A. V. Pose; T. B. Progulova; A. Prokes; V. V. Rybakov; L. A. Slepets; A. Zinchenko; A. F. Kamburyan; A. A. Loktionov; Yu. Potrebenikov

(130 ± 18 events) andΛc+→Λ0π+π+π− (57±14 events) have been detected. The mean value ofΛc+ mass is (2,268±6) MeV/c2. The invariant cross section forX>0.5 is described byE·d3σ/dp3∝ exp(−)bPT·(1−X)n withb=(2.5±0.6) (GeV/c)−1 andn=(1.5±0.5).The cross section of theΛc+ inclusive production measured forX>0.5 times the branching ratios are

Archive | 1989

Observation and study of a narrow state in aΣ−(1,385)K+ system

M. Vecko; M. Novak; J. Hladký; J. Krásová; A. N. Aleev; V. Arefiev; V. P. Balandin; V. K. Berdyshev; V. K. Birulev; A. S. Chvyrov; I. I. Evsikov; T. S. Grigalashvili; B. Guskov; K. Hiller; I. M. Ivanchenko; M. N. Kapishin; N. Karpenko; D. A. Kirillov; I. G. Kosarev; V. R. Krastev; N. A. Kuz'min; M. F. Likhachev; A. L. Lyubimov; A. N. Maksimov; P. V. Moisens; A. Morozov; V. V. Pal'chik; A. V. Pose; A. Prokes; L. V. Silvestrov

Czechoslovak Journal of Physics | 1992