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A.A. Grigorian
Researcher at Yerevan Physics Institute
Publications - 21
Citations - 864
A.A. Grigorian is an academic researcher from Yerevan Physics Institute. The author has contributed to research in topics: Large Hadron Collider & Charged particle. The author has an hindex of 11, co-authored 20 publications receiving 821 citations.
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Journal ArticleDOI
Evidence for deconfinement of quarks and gluons from the J/ψ suppression pattern measured in Pb-Pb collisions at the CERN-SPS
M.C. Abreu,Bruno Alessandro,C. Alexa,R. Arnaldi,M. Atayan,C. Baglin,A. Baldit,M. Bedjidian,S. Beolè,V. Boldea,P. Bordalo,A. Bussiere,L. Capelli,L. Casagrande,J. Castor,T. Chambon,B. Chaurand,I. Chevrot,B. Cheynis,E. Chiavassa,C. Cicalò,M. P. Comets,N. Constans,S. Constantinescu,João Cruz,A. De Falco,G. Dellacasa,N. De Marco,A. Devaux,S. Dita,O. Drapier,Laurent Ducroux,B. Espagnon,J. Fargeix,P. Force,M. Gallio,Yu.K. Gavrilov,C. Gerschel,Paolo Giubellino,M.B. Golubeva,M. Gonin,A.A. Grigorian,J.Y. Grossiord,F.F. Guber,A. Guichard,H. Gulkanyan,R. Hakobyan,R. Haroutunian,Marek Idzik,D. Jouan,T.L. Karavitcheva,L. Kluberg,A. B. Kurepin,Y. Le Bornec,C. Lourenço,M. Mac Cormick,P. Macciotta,A. Marzari-Chiesa,M. Masera,A. Masoni,S Mehrabyan,M. Monteno,S. Mourgues,A. Musso,P. Petiau,A. Piccotti,J.-R. Pizzi,F. Prino,G. Puddu,C. Quintans,L. Ramello,S. Ramos,P. Rato-Mendes,L. Riccati,A. Romana,I. Ropotar,P. Saturnini,Enrico Scomparin,S. Serci,R. Shahoyan,S. Silva,M. Sitta,C. Soave,P. Sonderegger,X. Tarrago,N.S. Topilskaya,G.L. Usai,E. Vercellin,L. Villatte,N. Willis +89 more
TL;DR: The analysis of the data collected by the NA50 experiment in 1998, reported in this paper, extends and clarifies the pattern of the previously observed J/ψ anomalous suppression.
Journal ArticleDOI
Observation of a threshold effect in the anomalous J/ψ suppression
M.C. Abreu,Bruno Alessandro,Calin Alexa,Roberta Arnaldi,J. Astruc,M. Atayan,C. Baglin,A. Baldit,M. Bedjidian,F. Bellaiche,Stefania Beole,V. Boldea,P. Bordalo,A. Bussiere,V. Capony,L. Casagrande,J. Castor,T. Chambon,B. Chaurand,I. Chevrot,Brigitte Cheynis,E. Chiavassa,Corrado Cicalo,M. P. Comets,N. Constans,Serban Constantinescu,João Cruz,A. De Falco,G. Dellacasa,N. De Marco,A. Devaux,Sanda Dita,O. Drapier,B. Espagnon,J. Fargeix,S. Filippov,François Fleuret,P. Force,Mauro Gallio,Lau Gatignon,Y.K. Gavrilov,C. Gerschel,Paolo Giubellino,M.B. Golubeva,M. Gonin,A.A. Grigorian,J.-Y. Grossiord,F.F. Guber,A. Guichard,H.R. Gulkanyan,R. Hakobyan,R. Haroutunian,Marek Idzik,D. Jouan,T.L. Karavitcheva,L. Kluberg,Alexey Kurepin,Y. Le Bornec,Carlos Lourenco,L. Luquin,M. Mac Cormick,P. Macciotta,A. Marzari-Chiesa,Massimo Masera,A. Masoni,S Mehrabyan,Marco Monteno,S. Mourgues,A. Musso,F. Ohlsson-Malek,P. Petiau,A. Piccotti,J.-R. Pizzi,W.L. Prado da Silva,F. Prino,G. Puddu,C. Quintans,C. Racca,Luciano Ramello,S. Ramos,P. Rato-Mendes,L. Riccati,A. Romana,I. Ropotar,P. Saturnini,Enrico Scomparin,Sergio Serci,Ruben Shahoyan,S. Silva,Mario Sitta,C. Soave,P. Sonderegger,X. Tarrago,Petar Temnikov,N.S. Topilskaya,G. L. Usai,Ermanno Vercellin,N. Willis +97 more
TL;DR: In this paper, a phase transition from ordinary nuclear matter to a state of deconfined quarks and gluons as predicted by lattice QCD calculations was found in central Pb-Pb collisions.
Journal ArticleDOI
Transverse momentum distributions of J/ψ, ψ′, Drell–Yan and continuum dimuons produced in Pb–Pb interactions at the SPS
M.C. Abreu,Bruno Alessandro,C. Alexa,R. Arnaldi,M. Atayan,C. Baglin,A. Baldit,M. Bedjidian,F. Bellaiche,S. Beolè,V. Boldea,P. Bordalo,A. Bussiere,L. Capelli,V. Capony,L. Casagrande,J. Castor,T. Chambon,B. Chaurand,I. Chevrot,B. Cheynis,E. Chiavassa,C. Cicalò,M. P. Comets,N. Constans,S. Constantinescu,João Cruz,A. De Falco,G. Dellacasa,N. De Marco,A. Devaux,S. Dita,O. Drapier,Laurent Ducroux,B. Espagnon,J. Fargeix,P. Force,M. Gallio,Yu.K. Gavrilov,C. Gerschel,Paolo Giubellino,M.B. Golubeva,M. Gonin,A.A. Grigorian,J.Y. Grossiord,F.F. Guber,A. Guichard,H. Gulkanyan,R. Hakobyan,R. Haroutunian,Marek Idzik,D. Jouan,T.L. Karavitcheva,L. Kluberg,A. B. Kurepin,Y. Le Bornec,C. Lourenço,M. Mac Cormick,P. Macciotta,A. Marzari-Chiesa,M. Masera,A. Masoni,S Mehrabyan,Marco Monteno,S. Mourgues,A. Musso,F Ohlson-Malek,P. Petiau,A. Piccotti,J.-R. Pizzi,F. Prino,G. Puddu,C. Quintans,L. Ramello,S. Ramos,P. Rato-Mendes,L. Riccati,A. Romana,I. Ropotar,P. Saturnini,Enrico Scomparin,S. Serci,R. Shahoyan,S. Silva,Mario Sitta,C. Soave,P. Sonderegger,X. Tarrago,N.S. Topilskaya,G.L. Usai,E. Vercellin,L. Villatte,N. Willis +92 more
TL;DR: In particular, the dependence of these distributions on the centrality of the Pb-Pb collision was investigated in detail in this article, where the transverse momentum distributions of the \jpsi, \psip\ and dimuons in the mass continuum were investigated.
Journal ArticleDOI
The dependence of the anomalous J/ψ suppression on the number of participant nucleons
M.C. Abreu,Bruno Alessandro,C. Alexa,R. Arnaldi,M. Atayan,C. Baglin,A. Baldit,M. Bedjidian,S. Beolè,V. Boldea,P. Bordalo,G. Borges,A. Bussiere,L. Capelli,J. Castor,C. Castanier,B. Chaurand,I. Chevrot,B. Cheynis,E. Chiavassa,C. Cicalò,T. Claudino,M. P. Comets,N. Constans,S. Constantinescu,Pietro Cortese,N. De Marco,A. De Falco,G. Dellacasa,A. Devaux,S. Dita,O. Drapier,Laurent Ducroux,B. Espagnon,J. Fargeix,P. Force,M. Gallio,Yu.K. Gavrilov,C. Gerschel,Paolo Giubellino,M.B. Golubeva,M. Gonin,A.A. Grigorian,S. Grigorian,J.Y. Grossiord,F.F. Guber,A. Guichard,H. Gulkanyan,R. Hakobyan,R. Haroutunian,Marek Idzik,D. Jouan,T.L. Karavitcheva,L. Kluberg,A. B. Kurepin,Y. Le Bornec,C. Lourenço,P. Macciotta,M. Mac Cormick,A. Marzari-Chiesa,M. Masera,A. Masoni,Marco Monteno,A. Musso,P. Petiau,A. Piccotti,J.-R. Pizzi,F. Prino,G. Puddu,C. Quintans,S. Ramos,L. Ramello,P. Rato Mendes,L. Riccati,A. Romana,H Santos,P. Saturnini,E Scalas,Enrico Scomparin,S. Serci,R. Shahoyan,F. Sigaudo,S. Silva,Mario Sitta,P. Sonderegger,X. Tarrago,N.S. Topilskaya,G.L. Usai,E. Vercellin,L. Villatte,N. Willis +90 more
TL;DR: In this article, a Glauber approach was used to determine the anomalous J/ ψ suppression pattern as a function of the forward hadronic energy measured in a zero degree calcimeter (ZDC).
Journal ArticleDOI
Charmonia and Drell-Yan production in proton-nucleus collisions at the CERN SPS
Bruno Alessandro,C. Alexa,R. Arnaldi,M. Atayan,C. Baglin,S. Beolè,V. Boldea,P. Bordalo,S. Borenstein,G. Borges,A. Bussiere,L Capelli,C Castanier,J. Castor,B. Chaurand,B. Cheynis,E. Chiavassa,C. Cicalò,T. Claudino,M. P. Comets,N. Constans,S. Constantinescu,Pietro Cortese,João Cruz,A. De Falco,N. De Marco,G. Dellacasa,A. Devaux,S. Dita,O. Drapier,Laurent Ducroux,B. Espagnon,J. Fargeix,P. Force,M. Gallio,Yu.K. Gavrilov,C. Gerschel,Paolo Giubellino,M.B. Golubeva,M. Gonin,A.A. Grigorian,S. Grigorian,J.Y. Grossiord,F.F. Guber,A. Guichard,H. Gulkanyan,R. Hakobyan,Marek Idzik,D. Jouan,T.L. Karavitcheva,L. Kluberg,A. B. Kurepin,Y. Le Bornec,C. Lourenço,P. Macciotta,M. Mac Cormick,A. Marzari-Chiesa,M. Masera,A. Masoni,Marco Monteno,A. Musso,P. Petiau,A. Piccotti,J.-R. Pizzi,W.L. Prado da Silva,F Prino,G. Puddu,C. Quintans,L. Ramello,S. Ramos,P. Rato Mendes,L. Riccati,A. Romana,Helena Santos,P. Saturnini,Enrico Scalas,Enrico Scomparin,S. Serci,R. Shahoyan,F. Sigaudo,Mario Sitta,P. Sonderegger,X. Tarrago,N.S. Topilskaya,G.L. Usai,E. Vercellin,L Villatte,N. Willis +87 more
TL;DR: In this paper, an experimental study of charmonia and Drell-Yan production in proton-nucleus collisions at 450 GeV/c is presented, where the results are analyzed in the framework of the Glauber model and lead to the values of the nuclear absorption cross-section σabspA for J/ψ and ψ′.