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27 results on '"Grigoryan, A.A."'

2. PATH COMPLEXES AND THEIR HOMOLOGIES

Author

Grigoryan, A.A., Lin, Yong, Muranov, Yu.V., and Yau, Shing-Tung

Subjects
Mathematics
Abstract

We introduce the notions of a path complex and its homologies. Particular cases of path homologies are simplicial homologies and digraph homologies. We state and prove some properties of path homologies, in particular, the Kunneth formulas for Cartesian product and join, which happen to be true at the level of chain complexes., UDC 512.66+519.17 1. Introduction The subject of this paper is the notion of a path complex, which unifies and generalizes the notions of a simplicial complex and a digraph (=directed [...]

Published
2020
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14. Charmonia Production at the CERN/SPS

Author

Alessandro, B., Alexa, C., Arnaldi, R., Atayan, M., Beole, S., Boldea, V., Bordalo, P., Borges, G., Castanier, C., Castor, J., Chaurand, B., Cheynis, B., Chiavassa, E., Cicalo, C., Comets, M.P., Constantinescu, S., Cortese, P., De Falco, A., De Marco, N., Dellacasa, G., Devaux, A., Dita, S., Fargeix, J., Force, P., Gallio, M., Gerschel, C., Giubellino, P., Golubeva, M.B., Grigoryan, A.A., Grigoryan, S., Guber, F.F., Guichard, A., Gulkanyan, H., Idzik, M., Jouan, D., Karavicheva, T.L., Kluberg, L., Kurepin, A.B., Le Bornec, Y., Lourenço, C., Mac Cormick, M., Marzari-Chiesa, A., Masera, M., Masoni, A., Monteno, M., Musso, A., Petiau, P., Piccotti, A., Pizzi, J.-R., Prino, F., Puddu, G., Quintans, C., Ramello, L., Ramos, S., Riccati, L., Santos, H., Saturnini, P., Scomparin, E., Serci, S., Shahoyan, R., Sigaudo, F., Sitta, M., Sonderegger, P., Tarrago, X., Topilskaya, N.S., Usai, G.L., Vercellin, E., Villatte, L., Willis, N., Wu, T., Laboratoire de Physique Corpusculaire - Clermont-Ferrand (LPC), Université Blaise Pascal - Clermont-Ferrand 2 (UBP)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Institut de Physique Nucléaire de Lyon (IPNL), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Institut de Physique Nucléaire d'Orsay (IPNO), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), NA50, Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), and Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11)

Subjects
High Energy Physics - Experiment (hep-ex), [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], FOS: Physical sciences, Particle Physics - Experiment, High Energy Physics - Experiment
Abstract

We present the final results of experiment NA50 on charmonia production in Pb-Pb interactions at 158 A GeV. A strong increasing suppression is observed with increasing centrality, for both the jpsi and psiprime resonances. We also present new developments regarding the jpsi and psiprime normal nuclear absorption determinations deduced from proton-nucleus data only. Their comparison with Pb-Pb results allows us to conclude that the jpsi anomalous suppression sets in at mid-centralities while the S-U results show a reasonable agreement with the p-A behavior. The psiprime suffers a significantly stronger suppression already in S-U interactions, which continuously increases in the Pb-Pb system, and is completely incompatible with the expected behavior deduced from p-A collisions., Comment: 4 pages, 5 figures, XXXXth Rencontres de Moriond conference

Published
2005

15. Ammonium concentrations in produced waters from a mesothermic oil field subjected to nitrate injection decrease through formation of denitrifying biomass and anammox activity

Author

Shartau, S.L.C., Yurkiw, M., Lin, S.P., Grigoryan, A.A., Lambo, A., Park, H.S., Lomans, B.P., Biezen, E. Van de, Jetten, M.S.M., Voordouw, G., Shartau, S.L.C., Yurkiw, M., Lin, S.P., Grigoryan, A.A., Lambo, A., Park, H.S., Lomans, B.P., Biezen, E. Van de, Jetten, M.S.M., and Voordouw, G.

Abstract

Contains fulltext : 83421.pdf (publisher's version ) (Closed access)

Published
2010

22. Comprehensive evidence for a narrow <img src="/fulltext-image.asp?format=htmlnonpaginated&src=8N5GYN8VANK6PV62_html\" border="0" alt="${\mathrm{p}}\overline{\mathrm{p}}$" /> state of mass 2.02 GeV <img src="/fulltext-image.asp?format=htmlnonpaginated&src=8N5GYN8VANK6PV62_html\" border="0" alt="$/c^2$" />

Author

Ferrer, A., Grigoryan, A.A., Perepelitsa, V.F., and Sonderegger, P.

Abstract

Abstract.: We review earlier results, and add new evidence, on the existence of a narrow state at a mass of 2.02 GeV, which is seen in six different final states, produced via baryon exchange in interactions at 20 (12) GeV. The data come from a new analysis of the WA56 experiment done at the CERN Omega spectrometer. The 2020 peak is produced near mid-rapidity, in a kinematic region not explored before in baryon exchange processes. Agreement is found with an earlier observation of this state, and its absence in a series of unsuccessful searches is explained. Very low upper limits on mesonic decays of this state favor its interpretation as a baryonium candidate.

Published
1999
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26. NA50 Collaboration

Author

Alessandro, B., Alexa, C., Arnaldi, R., Atayan, M., Beolè, S., Boldea, V., Bordalo, P., Borges, G., Castanier, C., Castor, J., Chaurand, B., Cheynis, B., Chiavassa, E., Cicalò, C., Comets, M.P., Constantinescu, S., Cortese, P., De Falco, A., De Marco, N., Dellacasa, G., Devaux, A., Dita, S., Fargeix, J., Force, P., Gallio, M., Gerschel, C., Giubellino, P., Golubeva, M.B., Grigoryan, A.A., Grigoryan, S., Guber, F.F., Guichard, A., Gulkanyan, H., Idzik, M., Jouan, D., Karavicheva, T.L., Kluberg, L., Kurepin, A.B., Le Bornec, Y., Lourenço, C., Mac Cormick, M., Marzari-Chiesa, A., Masera, M., Masoni, A., Monteno, M., Musso, A., Petiau, P., Piccotti, A., Pizzi, J.R., Prino, F., Puddu, G., Quintans, C., Ramello, L., Ramos, S., Riccati, L., Santos, H., Saturnini, P., Scomparin, E., Serci, S., Shahoyan, R., Sigaudo, F., Sitta, M., Sonderegger, P., Tarrago, X., Topilskaya, N.S., Usai, G.L., Vercellin, E., Villatte, L., Willis, N., and Wu, T.

Published
2006
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