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1. Total cross section measurements with π− , Σ− and protons on nuclei and nucleons around

Author

U. Dersch, N. Akchurin, V.A. Andreev, A.G. Atamantchouk, M. Aykac, M.Y. Balatz, N.F. Bondar, A. Bravar, P.S. Cooper, L.J. Dauwe, G.V. Davidenko, G. Dirkes, A.G. Dolgolenko, D. Dreossi, G.B. Dzyubenko, R. Edelstein, L. Emediato, A.M.F. Endler, J. Engelfried, I. Eschrich, C.O. Escobar, A.V. Evdokimov, I.S. Filimonov, F.G. Garcia, M. Gaspero, S. Gerzon, I. Giller, V.L. Golovtsov, Y.M. Goncharenko, E. Gottschalk, P. Gouffon, O.A. Grachov, E. Gülmez, He Kangling, M. Iori, S.Y. Jun, A.D. Kamenskii, M. Kaya, J. Kilmer, V.T. Kim, L.M. Kochenda, K. Königsmann, I. Konorov, A.P. Kozhevnikov, A.G. Krivshich, H. Krüger, M.A. Kubantsev, V.P. Kubarovsky, A.I. Kulyavtsev, N.P. Kuropatkin, V.F. Kurshetsov, A. Kushnirenko, S. Kwan, J. Lach, A. Lamberto, L.G. Landsberg, I. Larin, E.M. Leikin, Li Yunshan, Li Zhigang, M. Luksys, T. Lungov, D. Magarrel, V.P. Maleev, D. Mao, Mao Chensheng, Mao Zhenlin, S. Masciocchi, P. Mathew, M. Mattson, V. Matveev, E. McCliment, S.L. McKenna, M.A. Moinester, V.V. Molchanov, A. Morelos, V.A. Mukhin, K.D. Nelson, A.V. Nemitkin, P.V. Neoustroev, C. Newsom, A.P. Nilov, S.B. Nurushev, A. Ocherashvili, G. Oleynik, Y. Onel, E. Ozel, S. Ozkorucuklu, S. Patrichev, A. Penzo, S.I. Petrenko, P. Pogodin, B. Povh, M. Procario, V.A. Prutskoi, E. Ramberg, G.F. Rapazzo, B.V. Razmyslovich, V.I. Rud, J. Russ, Y. Scheglov, P. Schiavon, V.K. Semyatchkin, J. Simon, A.I. Sitnikov, D. Skow, V.J. Smith, M. Srivastava, V. Steiner, V. Stepanov, L. Stutte, M. Svoiski, N.K. Terentyev, G.P. Thomas, L.N. Uvarov, A.N. Vasiliev, D.V. Vavilov, V.S. Verebryusov, V.A. Victorov, V.E. Vishnyakov, A.A. Vorobyov, K. Vorwalter, J. You, Zhao Wenheng, Zheng Shuchen, and R. Zukanovich-Funchal

Subjects
Physics, Nuclear and High Energy Physics, Particle physics, 010308 nuclear & particles physics, Nuclear Theory, chemistry.chemical_element, Sigma, 7. Clean energy, 01 natural sciences, Copper, respiratory tract diseases, Nuclear physics, Momentum, Cross section (physics), chemistry, 0103 physical sciences, High Energy Physics::Experiment, Fermilab, Beryllium, Nuclear Experiment, 010306 general physics, Nucleon, Carbon
Abstract

Total cross sections for Sigma- and pi- on beryllium, carbon, polyethylene and copper as well as total cross sections for protons on beryllium and carbon have been measured in a broad momentum range around 600GeV/c. These measurements were performed with a transmission technique adapted to the SELEX hyperon-beam experiment at Fermilab. We report on results obtained for hadron-nucleus cross sections and on results for sigma_tot(Sigma- N) and sigma_tot(pi- N), which were deduced from nuclear cross sections.

Published
2000
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2. Observation of the Cabibbo-Suppressed DecayΞc+→pK−π+

Author

S. Y. Jun, N. Akchurin, V. A. Andreev, A. G. Atamantchouk, M. Aykac, M. Y. Balatz, N. F. Bondar, A. Bravar, P. S. Cooper, L. J. Dauwe, G. V. Davidenko, U. Dersch, A. G. Dolgolenko, D. Dreossi, G. B. Dzyubenko, R. Edelstein, L. Emediato, A. M. F. Endler, J. Engelfried, I. Eschrich, C. O. Escobar, A. V. Evdokimov, I. S. Filimonov, F. G. Garcia, M. Gaspero, S. Gerzon, I. Giller, V. L. Golovtsov, Y. M. Goncharenko, E. Gottschalk, P. Gouffon, O. A. Grachov, E. Gülmez, M. Iori, A. D. Kamenski, H. Kangling, M. Kaya, J. Kilmer, V. T. Kim, L. M. Kochenda, K. Königsmann, I. Konorov, A. A. Kozhevnikov, A. G. Krivshich, H. Krüger, M. A. Kubantsev, V. P. Kubarovsky, A. I. Kulyavtsev, N. P. Kuropatkin, V. F. Kurshetsov, A. Kushnirenko, S. Kwan, J. Lach, A. Lamberto, L. G. Landsberg, I. Larin, E. M. Leikin, M. Luksys, T. Lungov, D. Magarrel, V. P. Maleev, D. Mao, S. Masciocchi, P. Mathew, M. Mattson, V. Matveev, E. McCliment, S. L. McKenna, M. A. Moinester, V. V. Molchanov, A. Morelos, V. A. Mukhin, K. D. Nelson, A. V. Nemitkin, P. V. Neoustroev, C. Newsom, A. P. Nilov, S. B. Nurushev, A. Ocherashvili, G. Oleynik, Y. Onel, E. Ozel, S. Ozkorucuklu, S. Patrichev, A. Penzo, S. I. Petrenko, P. Pogodin, B. Povh, M. Procario, V. A. Prutskoi, E. Ramberg, G. F. Rappazzo, B. V. Razmyslovich, V. I. Rud, J. Russ, P. Schiavon, V. K. Semyatchkin, J. Simon, A. I. Sitnikov, D. Skow, V. J. Smith, M. Srivastava, V. Steiner, V. Stepanov, L. Stutte, M. Svoiski, N. K. Terentyev, G. P. Thomas, L. N. Uvarov, A. N. Vasiliev, D. V. Vavilov, V. S. Verebryusov, V. A. Victorov, V. E. Vishnyakov, A. A. Vorobyov, K. Vorwalter, Z. Wenheng, J. You, L. Yunshan, M. Zhenlin, L. Zhigang, and R. Zukanovich Funchal

Subjects
Physics, Meson, 010308 nuclear & particles physics, Stereochemistry, Branching fraction, General Physics and Astronomy, 01 natural sciences, Xi baryon, Sigma baryon, Nuclear physics, Baryon, Charmed baryons, Particle decay, 0103 physical sciences, Pi, 010306 general physics
Abstract

We report the first observation of the Cabibbo-suppressed charm baryon decay Xi(+)(c)-->pK(-)pi(+). We observe 150+/-22+/-5 events for the signal. The data were accumulated using the SELEX spectrometer during the 1996-1997 fixed target run at Fermilab, chiefly from a 600 GeV/c Sigma(-) beam. The branching fractions of the decay relative to the Cabibbo-favored Xi(+)(c)-->Sigma+K-pi(+) and Xi(+)(c)-->Xi(-)pi(+)pi(+) are measured to be B(Xi(+)(c)-->pK(-)pi(+))/B(Xi(+)(c)-->Sigma+K-pi(+)) = 0.22+/-0. 06+/-0.03 and B(Xi(+)(c)-->pK(-)pi(+))/B(Xi(+)(c)-->Xi(-)pi(+)pi(+)) = 0.20+/-0.04+/-0.02, respectively.

Published
2000
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3. Observation of the Cabibbo-Suppressed Decay Ξ_{c}^{+} → pK^{-}π^{+}

Author

S Y, Jun, N, Akchurin, V A, Andreev, A G, Atamantchouk, M, Aykac, M Y, Balatz, N F, Bondar, A, Bravar, P S, Cooper, L J, Dauwe, G V, Davidenko, U, Dersch, A G, Dolgolenko, D, Dreossi, G B, Dzyubenko, R, Edelstein, L, Emediato, A M, Endler, J, Engelfried, I, Eschrich, C O, Escobar, A V, Evdokimov, I S, Filimonov, F G, Garcia, M, Gaspero, S, Gerzon, I, Giller, V L, Golovtsov, Y M, Goncharenko, E, Gottschalk, P, Gouffon, O A, Grachov, E, Gülmez, M, Iori, A D, Kamenski, H, Kangling, M, Kaya, J, Kilmer, V T, Kim, L M, Kochenda, K, Königsmann, I, Konorov, A A, Kozhevnikov, A G, Krivshich, H, Krüger, M A, Kubantsev, V P, Kubarovsky, A I, Kulyavtsev, N P, Kuropatkin, V F, Kurshetsov, A, Kushnirenko, S, Kwan, J, Lach, A, Lamberto, L G, Landsberg, I, Larin, E M, Leikin, M, Luksys, T, Lungov, D, Magarrel, V P, Maleev, D, Mao, S, Masciocchi, P, Mathew, M, Mattson, V, Matveev, E, McCliment, S L, McKenna, M A, Moinester, V V, Molchanov, A, Morelos, V A, Mukhin, K D, Nelson, A V, Nemitkin, P V, Neoustroev, C, Newsom, A P, Nilov, S B, Nurushev, A, Ocherashvili, G, Oleynik, Y, Onel, E, Ozel, S, Ozkorucuklu, S, Patrichev, A, Penzo, S I, Petrenko, P, Pogodin, B, Povh, M, Procario, V A, Prutskoi, E, Ramberg, G F, Rappazzo, B V, Razmyslovich, V I, Rud, J, Russ, P, Schiavon, V K, Semyatchkin, J, Simon, A I, Sitnikov, D, Skow, V J, Smith, M, Srivastava, V, Steiner, V, Stepanov, L, Stutte, M, Svoiski, N K, Terentyev, G P, Thomas, L N, Uvarov, A N, Vasiliev, D V, Vavilov, V S, Verebryusov, V A, Victorov, V E, Vishnyakov, A A, Vorobyov, K, Vorwalter, Z, Wenheng, J, You, L, Yunshan, M, Zhenlin, L, Zhigang, and R, Zukanovich Funchal

Abstract

We report the first observation of the Cabibbo-suppressed charm baryon decay Ξ_{c}^{+}→pK^{-}π^{+}. We observe 150±22±5 events for the signal. The data were accumulated using the SELEX spectrometer during the 1996-1997 fixed target run at Fermilab, chiefly from a 600 GeV/c Σ^{-} beam. The branching fractions of the decay relative to the Cabibbo-favored Ξ_{c}^{+}→Σ^{+}K^{-}π^{+} and Ξ_{c}^{+}→Ξ^{-}π^{+}π^{+} are measured to be B(Ξ_{c}^{+}→pK^{-}π^{+})/B(Ξ_{c}^{+}→Σ^{+}K^{-}π^{+})=0.22±0.06±0.03 and B(Ξ_{c}^{+}→pK^{-}π^{+})/B(Ξ_{c}^{+}→Ξ^{-}π^{+}π^{+})=0.20±0.04±0.02, respectively.

Published
1999

4. Observation of the Cabibbo-Suppressed Decay Ξ_{c}^{+} → pK^{-}π^{+}.

Author

Jun SY, Akchurin N, Andreev VA, Atamantchouk AG, Aykac M, Balatz MY, Bondar NF, Bravar A, Cooper PS, Dauwe LJ, Davidenko GV, Dersch U, Dolgolenko AG, Dreossi D, Dzyubenko GB, Edelstein R, Emediato L, Endler AM, Engelfried J, Eschrich I, Escobar CO, Evdokimov AV, Filimonov IS, Garcia FG, Gaspero M, Gerzon S, Giller I, Golovtsov VL, Goncharenko YM, Gottschalk E, Gouffon P, Grachov OA, Gülmez E, Iori M, Kamenski AD, Kangling H, Kaya M, Kilmer J, Kim VT, Kochenda LM, Königsmann K, Konorov I, Kozhevnikov AA, Krivshich AG, Krüger H, Kubantsev MA, Kubarovsky VP, Kulyavtsev AI, Kuropatkin NP, Kurshetsov VF, Kushnirenko A, Kwan S, Lach J, Lamberto A, Landsberg LG, Larin I, Leikin EM, Luksys M, Lungov T, Magarrel D, Maleev VP, Mao D, Masciocchi S, Mathew P, Mattson M, Matveev V, McCliment E, McKenna SL, Moinester MA, Molchanov VV, Morelos A, Mukhin VA, Nelson KD, Nemitkin AV, Neoustroev PV, Newsom C, Nilov AP, Nurushev SB, Ocherashvili A, Oleynik G, Onel Y, Ozel E, Ozkorucuklu S, Patrichev S, Penzo A, Petrenko SI, Pogodin P, Povh B, Procario M, Prutskoi VA, Ramberg E, Rappazzo GF, Razmyslovich BV, Rud VI, Russ J, Schiavon P, Semyatchkin VK, Simon J, Sitnikov AI, Skow D, Smith VJ, Srivastava M, Steiner V, Stepanov V, Stutte L, Svoiski M, Terentyev NK, Thomas GP, Uvarov LN, Vasiliev AN, Vavilov DV, Verebryusov VS, Victorov VA, Vishnyakov VE, Vorobyov AA, Vorwalter K, Wenheng Z, You J, Yunshan L, Zhenlin M, Zhigang L, and Zukanovich Funchal R

Abstract

We report the first observation of the Cabibbo-suppressed charm baryon decay Ξ_{c}^{+}→pK^{-}π^{+}. We observe 150±22±5 events for the signal. The data were accumulated using the SELEX spectrometer during the 1996-1997 fixed target run at Fermilab, chiefly from a 600 GeV/c Σ^{-} beam. The branching fractions of the decay relative to the Cabibbo-favored Ξ_{c}^{+}→Σ^{+}K^{-}π^{+} and Ξ_{c}^{+}→Ξ^{-}π^{+}π^{+} are measured to be B(Ξ_{c}^{+}→pK^{-}π^{+})/B(Ξ_{c}^{+}→Σ^{+}K^{-}π^{+})=0.22±0.06±0.03 and B(Ξ_{c}^{+}→pK^{-}π^{+})/B(Ξ_{c}^{+}→Ξ^{-}π^{+}π^{+})=0.20±0.04±0.02, respectively.

Published
2000
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