Determination of αs and the gluon distribution using direct photon production in and pp collisions

Autor: C. Joseph, M. T. Tran, D. Ruegger, L. Camilleri, Roger Rusack, J.L. Pagès, J. P. Perroud, W. Kubischta, F. Gaille, Oliver E. Overseth, Louis Dick, P.T. Cox, E.C. Dukes, L. Studer, Gregory R Snow, G. Valenti, P. Oberson, R.L. Cool, G. Ballocchi, A. Vacchi, D. Hubbard, Paolo Giacomelli, M. Werlen, E. Malamud, P. Cushman, C. Morel, D. Steiner, V. Singh, R. E. Breedon, J. F. Loude, A. Bernasconi, B. Gabioud, J.B. Jeanneret, G. Sozzi

Publikováno v: Physics Letters B. 317:250-256

Direct photon cross sections obtained in p p and pp collisions at √s = 24.3 GeV at the CERN SPS, are used in a next-to-leading order QCD analysis. From the cross-section difference σ( p p → γX) − σ (pp → γX) , and quark distributions meas

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::b5fcbbd740ca9e42be346d17038b7de5
https://doi.org/10.1016/0370-2693(93)91601-i

Measurement of the inclusive J/ψ production cross sections in and pp collisions at √s = 24.3 GeV

Autor: E.C. Dukes, F. Gaille, R. E. Breedon, J. F. Loude, J.L. Pages, G. Valenti, A. Bernasconi, P. Giacomelli, L. Camilleri, M. T. Tran, G. Sozzi, B. Gabioud, E. Malamud, Roger Rusack, J.B. Jeanneret, W. Kubischta, C. Morel, P. Cushman, Louis Dick, P.T. Cox, Gregory R Snow, D. Steiner, R.L. Cool, A. Vacchi, J. P. Perroud, C. Joseph, Oliver E. Overseth, D. Ruegger

Publikováno v: Physics Letters B. 252:505-510

The inclusive cross section times branching ratio for J/ψ→e + e − has been measured in the forward region in the UA6 experiment for p p and pp collisions at √ s = 24.3 GeV. The ratio of the pp to p p cross sections is found to be 0.76 ± 0.14

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::07346668d67917ac3fc73fb1aaebe035
https://doi.org/10.1016/0370-2693(90)90579-u

Exclusive Production ofK+K−π+π−in Photon-Photon Collisions

Autor: H. Aihara, M. Alston-Garnjost, J. C. Armitage, J. A. Bakken, A. Barbaro-Galtieri, A. R. Barker, A. V. Barnes, B. A. Barnett, H. -U. Bengtsson, D. L. Bintinger, B. J. Blumenfeld, G. J. Bobbink, A. D. Bross, C. D. Buchanan, A. Buijs, M. P. Cain, D. O. Caldwell, O. Chamberlain, C. -Y. Chien, A. R. Clark, A. Cordier, O. I. Dahl, C. T. Day, K. A. Derby, M. A. van Driel, P. H. Eberhard, A. M. Eisner, F. C. Erne, D. L. Fancher, H. Fujii, T. Fujii, B. Gabioud, J. W. Gary, W. Gorn, N. J. Hadley, J. M. Hauptman, W. Hofmann, J. E. Huth, J. Hylen, U. P. Joshi, T. Kamae, H. S. Kaye, K. H. Kees, R. W. Kenney, L. T. Kerth, Winston Ko, R. I. Koda, R. R. Kofler, K. K. Kwong, R. L. Lander, W. G. J. Langeveld, J. G. Layter, F. L. Linde, C. S. Lindsey, S. C. Loken, A. Lu, X. -Q. Lu, G. R. Lynch, L. Madansky, R. J. Madaras, K. Maeshima, B. D. Magnuson, J. N. Marx, K. Maruyama, G. E. Masek, J. A. J. Matthews, S. O. Melnikoff, E. S. Miller, W. Moses, R. R. McNeil, P. Nemethy, D. R. Nygren, P. J. Oddone, H. P. Paar, D. A. Palmer, D. A. Park, D. E. Pellett, A. Pevsner, M. Pripstein, P. R. Robrish, M. T. Ronan, R. R. Ross, F. R. Rouse, R. R. Sauerwein, K. A. Schwitkis, J. C. Sens, G. Shapiro, M. D. Shapiro, B. C. Shen, W. E. Slater, J. R. Smith, M. L. Stevenson, D. H. Stork, M. K. Sullivan, J. R. Thompson, H. K. Ticho, J. Timmer, N. Toge, R. van Tyen, B. van Uitert, G. J. VanDalen, R. F. van Daalen Wetters, W. Vernon, W. Wagner, E. M. Wang, Y. X. Wang, M. R. Wayne, W. A. Wenzel, J. T. White, M. C. S. Williams, H. Yamamoto, M. Yamauchi, S. J. Yellin, W. -M. Zhang

Publikováno v: Physical Review Letters. 54:2564-2567

We report a measurement of the reaction ..gamma gamma -->..K/sup +/K/sup -/..pi../sup +/..pi../sup -/ in both tagged and untagged events at PEP. The cross section rises with invariant ..gamma gamma.. mass to about 15 nb at 2 GeV and falls slowly at h

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::a17170e90b4bc4739d26634a7135a84a
https://doi.org/10.1103/physrevlett.54.2564

A Muon Detection System for the PEP4 Facility

Autor: Hirotsugu Fujii, B. C. Shen, D. A. Park, O. Chamberlain, W. E. Slater, A. Barbaro-Galtieri, G. Lynch, T. Kamae, C. S. Lindsey, W. Gorn, M. L. Stevenson, X-Q. Lu, K. K. Kwong, William A. Wenzel, J. A. Bakken, J. W. Gary, C. D. Buchanan, R. R. Kofler, D. H. Badtke, R. W. Kenney, Orin I. Dahl, J. Mallet, G. J. Van Dalen, Allan G Clark, J. N. Marx, M. Yamauchi, K. A. Derby, H. Hilke, J. Chiba, Marjorie Shapiro, J. M. Hauptman, W. Moses, R. van Tyen, A. D. Bross, H. Iwasaki, L. Madansky, P. S. Martin, J. Hylen, Ronald R. Ross, J. E. Huth, W-M. Zhang, Hiroaki Aihara, R. I. Koda, N. Toge, M. Alston-Garnjost, R. J. Madaras, F. R. Rouse, L. T. Kerth, D. H. Stork, D. L. Fancher, B. Heck, C. T. Day, H. Videau, W. J. Spangler, N. J. Hadley, J. G. Layter, R. Majka, R. F. vanDaalen Wetters, S. C. Loken, W. C. Carithers, M. E. Zeller, P. H. Eberhard, B. Gabioud, P. Delpiee, Mitchell Wayne, P. J. Oddone, A. V. Barnes, J. A. J. Matthews, P. Nemethy, M. T. Ronan, P. R. Robrish, M. Pripstein, C.Y. Chien, G. Shapiro, S. O. Melnikoff, K. Maruyama, H. K. Ticho, A. Pevsner, Barry Blumenfeld, D. R. Nygren, B. A. Barnett, T. Fujii

Publikováno v: IEEE Transactions on Nuclear Science. 30:67-70

A large muon detection system has been constructed and is fully operational in the PEP 4 facility. It is more than 99.6% efficient. The system is rugged and reliable. It is possible to verify the integrity of all the chambers in a few minutes. Associ

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::f12ab997c1091a42e07df7dea76d5d63
https://doi.org/10.1109/tns.1983.4332221

Prompt muon production ine+e−annihilations at 29 GeV

Autor: R. I. Koda, C. T. Day, J. E. Huth, D. R. Nygren, P. J. Oddone, M. Pripstein, H. U. Bengtsson, A. Cordier, D. H. Stork, B. Gabioud, J. A. Bakken, Hiroaki Aihara, A. Pevsner, G. R. Lynch, C. S. Lindsey, K. A. Derby, H. Yamamoto, B. A. Barnett, D. A. Park, L. T. Kerth, R. R. Sauerwein, R. R. Ross, Tuneyoshi Kamae, J. W. Gary, M. Yamauchi, P. R. Robrish, W. E. Slater, D. H. Badtke, O. Chamberlain, R. J. Madaras, J. N. Marx, Em Wang, B. C. Shen, A. Barbaro-Galtieri, W. Moses, F. R. Rouse, W. M. Zhang, Peter Nemethy, O. I. Dahl, L. Madansky, R. F. van Daalen Wetters, M. Alston-Garnjost, J. Hylen, R. W. Kenney, H. K. Ticho, A. R. Clark, X. Q. Lu, W. A. Wenzel, Hirotsugu Fujii, A. V. Barnes, N. Toge, A. D. Bross, M. T. Ronan, J. G. Layter, M. R. Wayne, G. J. Vandalen, W. Gorn, W. Hofmann, S. O. Melnikoff, C. Y. Chien, M. D. Shapiro, G. Shapiro, P. H. Eberhard, J. M. Hauptman, D. L. Fancher, N. J. Hadley, K. K. Kwong, T. Fujii, J. A J Matthews, B. J. Blumenfeld, S. C. Loken, K. Maruyama, R. R. Kofler, R. van Tyen, M. L. Stevenson, H. S. Kaye, C. D. Buchanan

Publikováno v: Physical Review D. 31:2719-2723

We have studied the production of prompt muons in hadronic events from ${e}^{+}$${e}^{\mathrm{\ensuremath{-}}}$ annihilation at a center-of-mass energy of 29 GeV with the PEP4-TPC (Time Projection Chamber) detector. The muon p and ${p}_{t}$ distribut

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::e6dd797b877f4c90610f7a9cc7386796
https://doi.org/10.1103/physrevd.31.2719