Summary
The associated charm production has been studied in pp interactions at\(\sqrt s = 62 GeV\). The comparison of the measured production cross-section and the e-/π- ratio with various theoretical models and with existing inclusive e/π measurements allows one to conclude that the most likely interpretation of the associated production is in terms of a charmed baryon Λ +e produced forward, plus the\(\bar D\) meson produced centrally.
Riassunto
Si è studiata la produzione associata di particelle con “charm” nelle interazioni pp a\(\sqrt s = 62 GeV\). Il confronto dei valori misurati della sezione d'urto di produzione e del rapporto e-/π- con vari modelli teorici e con le esistenti misure del valore inclusivo di e/π permette di concludere che l'interpretazione piú probabile della produzione associata osservata si ha in termini di un barione charmato Λ +c prodotto in avanti e di un mesone anticharmato\(\bar D\) prodotto in zona centrale.
Резюме
В pp взаимодействиях при\(\sqrt s = 62 GeV\) ГэВ исследуется ассоциативное рождение шарма. Сравнение измеренного поперечного сечения образования и отношения e-/π- с различными теоретическими моделями и с имеющимися инклюзивными e/π измерениями позволяет сделать вывод, что наиболее вероятная интерпретация ассоциативного рождения возможна в терминах очарованного бариона +c , рожденного в направлении вперед, плюс Λ\(\bar D\) мезон, рожденный центрально.
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References
D. Drijard, H. G. Fischer, W. Geist, R. Gokieli, P. G. Innocenti, V. Korbel, A. Minten, A. Norton, R. Sosnowski, S. Stein, O. Ullaland, H. D. Wahl, P. Burland, M. Della Negra, G. Fontaine, P. Frenkiel, C. Ghesquière, D. Linglin, G. Sajot, H. Frehse, E. E. Kluge, M. Heiden, A. Putzer, J. Stiewe, P. Hanke, W. Hofmann, M. Panter, K. Rauschnabel, J. Spengler andD. Wegener (CCHK Collaboration):Phys. Lett. B,81, 250 (1979).
K. L. Giboni, D. Dibitonto, M. Barone, M. M. Block, A. Böhm, R. Campanini, F. Ceradini, J. Eickmeyer, D. Hanna, J. Irion, A. Kernan, H. Ludwig, F. Muller, B. Naroska, F. Navach, M. Nussbaum, J. O'Connor, C. Rubbia, D. Schinzel, H. Seebrunner, A. Staude, R. Tirler, G. Van Dalen, R. Voss andR. Wojslaw (ACHMNR Collaboration):Phys. Lett. B,85, 437 (1979).
W. Lockman, T. Meyer, J. Rander, P. Schlein, R. Webb, S. Erhan andJ. Zsembery (UCLA-Saclay Collaboration):Phys. Lett. B,85, 443 (1979).
D. Drijard, H. G. Fischer, W. Geist, P. G. Innocenti, V. Korbel, A. Minten, A. Norton, S. Stein, O. Ullaland, H. D. Wahl, P. Burland, G. Fontaine, P. Frenkiel, C. Guesquière, G. Sajot, P. Hanke, W. Hofmann, M. Panter, K. Rauschnabel, J. Spengler, D. Wegener, H. Frehse, E. E. Kluge, M. Heiden, W. Herr, A. Putzer, M. Della Negra, D. Linglin, R. Gokieli, R. Sosnowski andM. Szeptycka (ACCDHW Collaboration):Phys. Lett. B,85, 452 (1979).
a)CCHK and ACCDHW Collaborations:Production of charm in the SFM at the ISR, presented byG. Sajot at theXX International Conference on High-Energy Physics, Madison, 1980; b)W. M. Geist: private communication.
a)ACHMNR Collaboration:Production of charmed particles at the CERN ISR, presented byF. Muller at theXX International Conference on High-Energy Physics, Madison, 1980; b)F. Muller: private communication.
A. Zichichi:Riv. Nuovo Cimento,2, No. 14 (1979).
M. Basile, G. Cara Romeo, L. Cifarelli, A. Contin, G. D'Ali, P. Giusti, T. Massam, F. Palmonari, G. Sartorelli, G. Valenti andA. Zichichi:Nucl. Instrum. Methods,163, 93 (1979).
H. Frehse, F. Lapique, M. Panter andF. Piuz:Nucl. Instrum. Methods,156, 87 (1978);H. Frehse, M. Heiden, M. Panter andF. Piuz:Nucl. Instrum. Methods,156, 97 (1978).
M. Basile, G. Cara Romeo, L. Cifarelli, A. Contin, G. D'Ali, P. Di Cesare, B. Esposito, L. Favale, P. Giusti, T. Massam, F. Palmonari, G. Sartorelli, G. Valenti andA. Zichichi:Nucl. Instrum. Methods,179, 477 (1981).
Particle Data Group:Review of particle properties, Rev. Mod. Phys.,52, No. 2 (1980).
D. Drijard, H. G. Fischer, W. Geist, P. G. Innocenti, V. Korbel, A. Minten, A. Norton, S. Stein, O. Ullaland, H. D. Wahl, G. Fontaine, P. Frenkiel, C. Ghesquière, G. Sajot, P. Hanke, W. Hofmann, M. Panter, K. Rauschnabel, J. Spengler, D. Wegener, H. Frehse, E. E. Kluge, M. Heiden, A. Putzer, M. Della Negra, D. Linglin, R. Gokieli andR. Sosnowski: preprint CERN-EP/81-12 (1981), submitted toZ. Phys. C.
W. Bacino, T. Ferguson, L. Nodulman, W. Slater, H. Ticho, A. Diamant-Berger, G. Donaldson, M. Duro, A. Hall, G. Irwin, J. Kirkby, R. Burns, P. Condon, P. Cowell andJ. Kirz:Phys. Rev. Lett.,43, 1073 (1979).
G. S. Abrams, M. S. Alam, C. A. Blocker, A. M. Boyarski, M. Breidenbach, D. L. Burke, W. C. Carithers, W. Chinowsky, M. W. Coles, S. Cooper, W. E. Dieterle, J. B. Dillon, J. Dorenbosch, J. M. Dorfan, M. W. Eaton, G. J. Feldman, M. E. B. Franklin, G. Gidal, G. Goldhaber, G. Hanson, K. G. Hayes, T. Himel, D. G. Hitlin, R. J. Hollebeek, W. R. Innes, J. A. Jaros, P. Jenni, A. D. Johnson, J. A. Kadyk, A. J. Lankford, R. R. Larsen, M. J. Longo, V. Lüth, R. E. Millikan, M. E. Nelson, C. Y. Pang, J. F. Patrick, M. L. Perl, B. Richter, A. Roussarie, J. J. Russell, D. L. Scharre, R. H. Schindler, R. F. Schwitters, J. L. Siegrist, J. Strait, H. Taureg, M. Tonutti, G. H. Trilling, E. N. Vella, R. A. Vidal, I. Videau, J. M. Weiss andH. Zaccone:Phys. Rev. Lett.,44, 10 (1980).
F. Muller:Charmed particles: properties and production characteristics, lectures given at theInternational School of Subnuclear Physics, Erice, 1980 (see preprint CERN-EP/80-195 (1980)).
F. W. Büsser, L. Camilleri, L. Di Lella, B. G. Pope, A. M. Smith, B. J. Blumenfeld, S. N. White, A. F. Rothenberg, S. L. Segler, M. J. Tannenbaum, M. Banner, J. B. Chèze, H. Kasha, J. P. Pansart, G. Smadja, J. Teiger, H. Zaccone andA. Zylberstejn:Nucl. Phys. B,113, 189 (1976);L. Baum, M. M. Block, B. Couchman, J. Crawford, A. Derevshchikov, D. Dibitonto, I. Golutvin, H. Hilscher, J. Irion, A. Kernan, V. Kukhtin, J. Layter, W. Marsh, P. McIntyre, F. Muller, B. Naroska, M. Nussbaum, A. Orkin-Lecourtois, L. Rossi, C. Rubbia, D. Schinzel, B. Shen, A. Staude, G. Tarnopolsky andR. Voss:Phys. Lett. B,60, 485 (1976);M. Barone, M. Block, A. Böhm, F. Ceradini, D. Dibitonto, J. Irion, A. Kernan, J. Layter, F. Muller, A. Nakkasyan, B. Naroska, F. Navach, M. Nussbaum, A. Orkin-Lecourtois, C. Rubbia, M. Sachwitz, D. Schinzel, H. Seebrunner, B. Shen, A. Staude, R. Tirler, G. Van Dalen, R. Voss andR. Wojslaw:Nucl. Phys. B,132, 29 (1978).
G. Gustafson andC. Peterson:Phys. Lett. B,67, 81 (1977).
B. L. Combridge:Nucl. Phys. B,151, 429 (1979).
C. E. Carlson andR. Suaya:Phys. Lett. B,81, 329 (1979).
H. Fritzsch andK. H. Streng:Phys. Lett. B,78, 447 (1978).
R. J. N. Phillips:Phenomenology of new particle production, rapporteur talk given at theXX International Conference on High-Energy Physics, Madison, 1980.
F. Muller: talk given at theCargèse International School of Physics, 1979 (see preprint CERN-EP/79-148 (1979)).
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Basile, M., Cara Romeo, G., Cifarelli, L. et al. Measurement of associated charm production in pp interactions at\(\sqrt s = 62 GeV\) . Nuov Cim A 63, 230–242 (1981). https://doi.org/10.1007/BF02902671
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DOI: https://doi.org/10.1007/BF02902671