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1. First observation of the Cabibbo-suppressed decays Xi(+)(c)->Sigma(+)pi(-)pi(+) and Xi(+)(c)->Sigma(-)pi(+)pi(+) and measurement of their branching ratios

Author

VAZQUEZ JAUREGUI, E, Engelfried, J, Akgun, U, Alkhazov, G, AMARO REYES, J, Atamantchouk, Ag, Ayan, As, Balatz, My, BLANCO COVARRUBIAS, A, Bondar, Nf, Cooper, Ps, Dauwe, Lj, Davidenko, Gv, Dersch, U, Dolgolenko, Ag, Dzyubenko, Gb, Edelstein, R, Emediato, L, Endler, Amf, Eschrich, I, Escobar, Co, Estrada, N, Evdokimov, Av, Filimonov, Is, Garcia, Fg, Gaspero, Mario, Giller, I, Golovtsov, Vl, Gouffon, P, Guelmez, E, Kangling, H, Iori, M, Jun, Sy, Kaya, M, Kilmer, J, Kim, Vt, Kochenda, Lm, Konorov, I, Kozhevnikov, Ap, Krivshich, Ag, Kruger, H, Kubantsev, Ma, Kubarovsky, Vp, Kulyavtsev, Ai, Kuropatkin, Np, Kurshetsov, Vf, Kushnirenko, A, Kwan, S, Lache, J, Lamberto, A, Landsberg, Lg, Larin, I, Leikin, Em, Yunshan, L, LOPEZ HINOJOSA, G, Luksys, M, Lungov, T, Maleev, Vp, Mao, D, Mao, Cs, Mao, Zl, Mathew, P, Mattson, M, Matveev, V, Mccliment, E, Moinester, Ma, Molchanov, Vv, Morelos, A, Nelson, Kd, Nemitkin, Av, Neoustroev, Pv, Newsom, C, Nilov, Ap, Nurushev, Sb, Ocherashvili, A, Onel, Y, Ozel, E, Ozkorucuklu, S, Penzo, A, Petrenko, Sv, Pogodin, P, Procario, M, Prutskoi, Va, Ramberg, E, Rappazzo, Gf, Razmysiovich, Bv, Rud, Vi, Russ, J, SANCHEZ LOPEZ JL, Schiavon, P, Simon, J, Sitnikov, Ai, Skow, D, Smith, Vj, Srivastava, M, Steiner, V, Stepanov, V, Stutte, L, Svoiski, M, Terentyev, Nk, Thomas, Gp, Torres, I, Uvarov, Ln, Vasiliev, An, Vavilov, Dv, Verebryusov, Vs, Victorov, Va, Vishnyakov, Ve, Vorobyov, Aa, Vorwalter, K, You, J, Zhao, Wh, Zheng, Sc, and ZUKANOVICH FUNCHAL, R.

Published
2008

2. Upper limit on the decay Sigma(1385)(-) -> Sigma(-)gamma and cross section for gamma Sigma(-) -> Lambda pi(-)

Author

Molchanov, Vv, Alkhazov, G, Atamantchouk, Ag, Balatz, My, Bondar, Nf, Casey, D, Cooper, Ps, Dauwe, Lj, Davidenko, Gv, Dersch, U, Dolgolenko, Ag, Dzyubenko, Gb, Edelstein, R, Emediato, L, Endler, Amf, Engelfried, J, Eschrich, I, Escobar, Co, Evdokimov, Av, Ferbel, T, Filimonov, Is, Garcia, Fg, Gaspero, Mario, Giller, I, Golovtsov, Vl, Gouffon, P, Gulmez, E, Hammer, C, Kangling, H, Iori, M, Jun, Sy, Kaya, M, Kilmer, J, Kim, Vt, Kochenda, Lm, Konorov, I, Kozhevnikov, Ap, Krivshich, Ag, Kruger, 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, Yunshan, L, Luksys, M, Lungov, T, Maleev, Vp, Mao, D, Chensheng, M, Zhenlin, M, Mathew, P, Mattson, M, Matveev, V, Mccliment, E, Moinester, Ma, Morelos, A, Mukhin, Va, Nelson, Kd, Nemitkin, Av, Neoustroev, Pv, Newsom, C, Nilov, Ap, Nurushev, Sb, Ocherashvili, A, Onel, Y, Ozel, E, Ozkorucuklu, S, Penzo, A, Petrenko, Sv, Pogodin, P, Procario, M, Prutskoi, Va, Ramberg, E, Rappazzo, Gf, Razmyslovich, Bv, Rud, Vi, Russ, J, Schiavon, P, Simon, J, Sitnikov, Ai, Skow, D, Slattery, P, 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, You, J, Zhao, Wh, Zheng, Sc, Zhu, Zh, Zielinski, M, and ZUKANOVICH FUNCHAL, R.

Published
2004

3. Nuclear deformation effects on GDR

Author

D'Agostino, P, Fazio, Giovanni, Giardina, Giorgio 42, Herman, M, Lamberto, A, Rappazzo, Gf, Sturiale, R, Malaguti, F, Eremenko, Do, Epemin, Nv, Platonov, Sy, and Yuminov, Oa

Published
1998

4. ANALYZING POWER MEASUREMENT IN INCLUSIVE LAMBDA(0) PRODUCTION WITH A 200 GEV/C POLARIZED PROTON-BEAM

Author

BRAVAR A, ADAMS DL, AKCHURIN N, BELIKOV NI, BONNER BE, BYSTRICKY J, CORCORAN MD, COSSAIRT JD, CRANSHAW J, DEREVSCHIKOV AA, ENYO H, FUNAHASHI H, GOTO Y, GRACHOV OA, GROSNICK DP, HILL DA, IIJIMA T, IMAI K, ITOW Y, IWATANI K, KRUEGER K, KURODA K, LAGHAI M, LANGLAND JL, LEHAR F, DELESQUEN A, LOPIANO D, LUEHRING FC, MAKI T, MAKINO T, MAKINO S, MASAIKE A, MATULENKO YA, MESCHANIN AP, MICHALOWICZ A, MILLER DH, MIYAKE K, NAGAMINE T, NESSI TEDALDI F, NESSI M, NGUYEN C, NURUSHEV SB, OHASHI Y, ONEL Y, PATALAKHA DI, PAULETTA G, PENZO A, RAPPAZZO GF, READ AL, ROBERTS JB, VANROSSUM L, RYKOV VL, SAITO N, SALVATO G, SCHIAVON P, SKEENS J, SOLOVYANOV VL, SPINKA H, STANEK RW, TAKASHIMA T, TAKEUTCHI F, UNDERWOOD DG, VASILIEV AN, WHITE JL, YAMASHITA S, YOKOSAWA A, YOSHIDA T, and ZANETTI A

Subjects
MODEL, 18.5 GEV/C, ASYMMETRY, High Energy Physics::Experiment, Nuclear Experiment, HADRON-PRODUCTION, HYPERON POLARIZATION, HIGH-ENERGIES
Abstract

The considerable polarization of hyperons produced at high x(F) has been known for a long time and has been interpreted with various theoretical models in terms of the constituents' spin. Recently, the analyzing power in inclusive Lambda(0) hyperon production has also been measured using the 200 GeV/c Fermilab polarized proton beam. The covered kinematic range is 0.2 less than or equal to x(F) less than or equal to 1.0 and 0.1 less than or equal to p(T) less than or equal to 1.5 GeV/c. The data indicate a negative asymmetry at large x(F) and moderate p(T). These results can further test the current ideas on the underlying mechanisms for hyperon polarization.

Published
1995
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5. Detection of atoms consisting of pi(+) and pi(-) mesons at PSCERN

Author

Afanasyev, L., Adeva, B., Benayoun, M., Berka, Z., Brekhovskikh, V., Caragheorgheopol, G., Cechak, T., Chiba, M., Constantini, S., Constantinescu, S., Doudarev, A., Dreossi, D., Drijard, D., Ferro-Luzzi, M., Torreira, Tg, Gerndt, J., Giacomich, R., Gianotti, P., Gomez, F., Gorin, A., Gortchakov, O., Guaraldo, C., Hansroul, M., Hosek, R., Iliescu, M., Jabitski, M., Kalinina, N., Karpukhin, V., Kluson, J., Kobayashi, M., Kokkas, P., Komarov, V., Koulikov, A., Kouptsov, A., Krouglov, V., Krouglova, L., Kuroda, Ki, Lamberto, A., Lanaro, A., Lapshin, V., Richard Lednicky, Leruste, P., Sandri, Pl, Aguera, Al, Lucherini, V., Maki, T., Manuilov, I., Montanet, L., Narjoux, Jl, Nemenov, L., Nikitin, M., Pardo, Tn, Okada, K., Olchevskii, V., Pazos, A., Pentia, M., Penzo, A., Perreau, Jm, Petrascu, C., Plo, M., Ponta, T., Pop, D., Rappazzo, Gf, Riazantsev, A., Rodriguez, Jm, Fernandez, Ar, Rykalin, V., Santamarina, C., Saborido, J., Schacher, J., Schuetz, C., Sidorov, A., Smolik, J., Takeutchi, F., Tarasov, A., Tauscher, L., Tobar, Mj, Trousov, S., Vazquez, P., Vlachos, S., Yazkov, V., Yoshimura, Y., and Zrelov, P.

6. Charm hadroproduction results from Selex

Author

Iori, M., 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, Amf, 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, Erhan Gülmez, He, Kl, Jun, Sy, Kamenskii, Kd, Kaya, M., Kilmer, J., Kim, Vt, Kochenda, Lm, Konigsmann, K., Konorov, I., Kozhevnikov, Ap, Krivshich, Ag, Kruger, 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, Li, Ys, Li, Zg, Luksys, M., Lungov, T., Magarrel, D., Maleev, Vp, Mao, D., Mao, Cs, Mao, Zl, 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., You, J., Zhao, Wh, Zheng, Sc, Zukanovich-Funchal, R., Selex, Collaboration, Huitu, K., and Kurkisuonio, H.

7. First Measurement of a Long-Lived π^{+}π^{-} Atom Lifetime.

Author

Adeva B, Afanasyev L, Anania A, Aogaki S, Benelli A, Brekhovskikh V, Cechak T, Chiba M, Chliapnikov PV, Doskarova P, Drijard D, Dudarev A, Dumitriu D, Fluerasu D, Gorin A, Gorchakov O, Gritsay K, Guaraldo C, Gugiu M, Hansroul M, Hons Z, Horikawa S, Iwashita Y, Karpukhin V, Kluson J, Kobayashi M, Kruglov V, Kruglova L, Kulikov A, Kulish E, Lamberto A, Lanaro A, Lednicky R, Mariñas C, Martincik J, Nemenov L, Nikitin M, Okada K, Olchevskii V, Ovsiannikov V, Pentia M, Penzo A, Plo M, Prusa P, Rappazzo GF, Romero Vidal A, Ryazantsev A, Rykalin V, Saborido J, Schacher J, Sidorov A, Smolik J, Takeutchi F, Trojek T, Trusov S, Urban T, Vrba T, Yazkov V, Yoshimura Y, and Zrelov P

Abstract

The adapted DIRAC experiment at the CERN PS accelerator observed for the first time long-lived hydrogenlike π^{+}π^{-} atoms, produced by protons hitting a beryllium target. A part of these atoms crossed the gap of 96 mm between the target and a 2.1  μm thick platinum foil, in which most of them dissociated. Analyzing the observed number of atomic pairs, n_{A}^{L}=436_{-61}^{+157}|_{tot}, the lifetime of the 2p state is found to be τ_{2p}=(0.45_{-0.30}^{+1.08}|_{tot})×10^{-11}  s, not contradicting the corresponding QED 2p state lifetime τ_{2p}^{QED}=1.17×10^{-11}  s. This lifetime value is three orders of magnitude larger than our previously measured value of the π^{+}π^{-} atom ground state lifetime τ=(3.15_{-0.26}^{+0.28}|_{tot})×10^{-15}  s. Further studies of long-lived π^{+}π^{-} atoms will allow us to measure energy differences between p and s atomic states and so to discriminate between the isoscalar and isotensor ππ scattering lengths with the aim to check QCD predictions.

Published
2019
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8. Observation of a narrow charm-strange meson D(+)(sJ)(2632)-->D(+)(s)eta and D(0)K(+).

Author

Evdokimov AV, Akgun U, Alkhazov G, Amaro-Reyes J, Atamantchouk AG, Ayan AS, Balatz MY, Bondar NF, Cooper PS, Dauwe LJ, Davidenko GV, Dersch U, Dolgolenko AG, Dzyubenko GB, Edelstein R, Emediato L, Endler AM, Engelfried J, Eschrich I, Escobar CO, Filimonov IS, Garcia FG, Gaspero M, Giller I, Golovtsov VL, Gouffon P, Gülmez E, Kangling H, Iori M, Jun SY, Kaya M, Kilmer J, Kim VT, Kochenda LM, Konorov I, Kozhevnikov AP, 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, Yunshan L, Luksys M, Lungov T, Maleev VP, Mao D, Chensheng M, Zhenlin M, Mathew P, Mattson M, Matveev V, McCliment E, Moinester MA, Molchanov VV, Morelos A, Nelson KD, Nemitkin AV, Neoustroev PV, Newsom C, Nilov AP, Nurushev SB, Ocherashvili A, Onel Y, Ozel E, Ozkorucuklu S, Penzo A, Petrenko SV, Pogodin P, Procario M, Ramberg E, Rappazzo GF, Razmyslovich BV, Rud VI, Russ J, Schiavon P, Simon J, Sitnikov AI, Skow D, Smith VJ, Srivastava M, Steiner V, Stepanov V, Stutte L, Svoiski M, Terentyev NK, Thomas GP, Torres I, Uvarov LN, Vasiliev AN, Vavilov DV, Vázquez-Jáuregui E, Verebryusov VS, Victorov VA, Vishnyakov VE, Vorobyov AA, Vorwalter K, You J, Wenheng Z, Shuchen Z, and Zukanovich-Funchal R

Abstract

We report the first observation of a charm-strange meson D(+)(sJ)(2632) at a mass of 2632.5+/-1.7 MeV/c(2) in data from SELEX, the charm hadro-production experiment E781 at Fermilab. This state is seen in two decay modes, D(+)(s)eta and D0K+. In the D(+)(s)eta decay mode we observe a peak with 101 events over a combinatoric background of 54.9 events at a mass of 2635.4+/-3.3 MeV/c(2). There is a corresponding peak of 21 events over a background of 6.9 at 2631.5+/-2.0 MeV/c(2) in the decay mode D0K+. The decay width of this state is <17 MeV/c(2) at 90% confidence level. The relative branching ratio Gamma(D0K+)/Gamma(D(+)(s)eta) is 0.14+/-0.06. The mechanism that keeps this state narrow is unclear. Its decay pattern is also unusual, being dominated by the D(+)(s)eta decay mode.

Published
2004
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9. First observation of the doubly charmed baryon Xi(+)(cc).

Author

Mattson M, Alkhazov G, Atamantchouk AG, Balatz MY, Bondar NF, Cooper PS, Dauwe LJ, Davidenko GV, Dersch U, Dolgolenko AG, Dzyubenko GB, Edelstein R, Emediato L, Endler AM, Engelfried J, Eschrich I, Escobar CO, Evdokimov AV, Filimonov IS, Garcia FG, Gaspero M, Giller I, Golovtsov VL, Gouffon P, Gülmez E, Kangling H, Iori M, Jun SY, Kaya M, Kilmer J, Kim VT, Kochenda LM, Konorov I, Kozhevnikov AP, 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, Yunshan L, Luksys M, Lungov T, Maleev VP, Mao D, Chensheng M, Zhenlin M, Mathew P, Matveev V, McCliment E, Moinester MA, Molchanov VV, Morelos A, Nelson KD, Nemitkin AV, Neoustroev PV, Newsom C, Nilov AP, Nurushev SB, Ocherashvili A, Oliveira E, Onel Y, Ozel E, Ozkorucuklu S, Penzo A, Petrenko SV, Pogodin P, Procario M, Prutskoi VA, Ramberg E, Rappazzo GF, Razmyslovich BV, Rud VI, Russ J, Schiavon P, 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, You J, Wenheng Z, Shuchen Z, and Zukanovich-Funchal R

Abstract

We observe a signal for the doubly charmed baryon Xi(+)(cc) in the charged decay mode Xi(+)(cc)-->Lambda(+)(c)K-pi(+) in data from SELEX, the charm hadroproduction experiment at Fermilab. We observe an excess of 15.9 events over an expected background of 6.1+/-0.5 events, a statistical significance of 6.3sigma. The observed mass of this state is 3519+/-1 MeV/c(2). The Gaussian mass width of this state is 3 MeV/c(2), consistent with resolution; its lifetime is less than 33 fs at 90% confidence.

Published
2002
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10. Precision measurements of the lambda(+)(c) and D0 lifetimes.

Author

Kushnirenko A, Alkhazov G, Atamantchouk AG, Balatz MY, Bondar NF, Cooper PS, Dauwe LJ, Davidenko GV, Dersch U, Dolgolenko AG, Dzyubenko GB, Edelstein R, Emediato L, Endler AM, Engelfried J, Eschrich I, Escobar CO, Evdokimov AV, Filimonov IS, Garcia FG, Gaspero M, Giller I, Golovtsov VL, Gouffon P, Gülmez E, Kangling H, Iori M, Jun SY, Kaya M, Kilmer J, Kim VT, Kochenda LM, Konorov I, Kozhevnikov AP, Krivshich AG, Krüger H, Kubantsev MA, Kubarovsky VP, Kulyavtsev AI, Kuropatkin NP, Kurshetsov VF, Kwan S, Lach J, Lamberto A, Landsberg LG, Larin I, Leikin EM, Yunshan L, Luksys M, Lungov T, Maleev VP, Mao D, Chensheng M, Zhenlin M, Mathew P, Mattson M, Matveev V, McCliment E, Moinester MA, Molchanov VV, Morelos A, Nelson KD, Nemitkin AV, Neoustroev PV, Newsom C, Nilov AP, Nurushev SB, Ocherashvili A, Onel Y, Ozel E, Ozkorucuklu S, Penzo A, Petrenko SV, Pogodin P, Procario M, Prutskoi VA, Ramberg E, Rappazzo GF, Razmyslovich BV, Rud VI, Russ J, Schiavon P, 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, You J, Wenheng Z, Shuchen Z, and Zukanovich-Funchal R

Abstract

We report new precision measurements of the lifetimes of the Lambda(+)(c) and D0 from SELEX, the charm hadroproduction experiment at Fermilab. Based upon 1630 Lambda(+)(c) and 10 210 D0 decays we observe lifetimes of tau[Lambda(+)(c)] = 198.1+/-7.0+/-5.6 fs and tau[D0] = 407.9+/-6.0+/-4.3 fs.

Published
2001
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11. Observation of the Cabibbo-Suppressed Decay Ξ&#95;{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&#95;{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&#95;{c}^{+}→Σ^{+}K^{-}π^{+} and Ξ&#95;{c}^{+}→Ξ^{-}π^{+}π^{+} are measured to be B(Ξ&#95;{c}^{+}→pK^{-}π^{+})/B(Ξ&#95;{c}^{+}→Σ^{+}K^{-}π^{+})=0.22±0.06±0.03 and B(Ξ&#95;{c}^{+}→pK^{-}π^{+})/B(Ξ&#95;{c}^{+}→Ξ^{-}π^{+}π^{+})=0.20±0.04±0.02, respectively.

Published
2000
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12. Single-Spin Asymmetries in Inclusive Charged Pion Production by Transversely Polarized Antiprotons.

Author

Bravar A, Adams DL, Akchurin N, Belikov NI, Bonner BE, Bystricky J, Corcoran MD, Cossairt JD, Cranshaw J, Derevschikov AA, En'yo H, Funahashi H, Goto Y, Grachov OA, Grosnick DP, Hill DA, Iijima T, Imai K, Itow Y, Iwatani K, Kharlov YV, Kuroda K, Laghai M, Lehar F, de Lesquen A, Lopiano D, Luehring FC, Maki T, Makino S, Masaike A, Matulenko YA, Meschanin AP, Michalowicz A, Miller DH, Miyake K, Nagamine T, Nessi-Tedaldi F, Nessi M, Nguyen C, Nurushev SB, Ohashi Y, Onel Y, Patalakha DI, Pauletta G, Penzo A, Rappazzo GF, Read AL, Roberts JB, van Rossum L, Rykov VL, Saito N, Salvato G, Schiavon P, Skeens J, Solovyanov VL, Spinka H, Stanek RW, Takashima R, Takeutchi F, Tamura N, Underwood DG, Vasiliev AN, White JL, and Yamashita S

Published
1996
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13. Analyzing power measurement of pp elastic scattering in the Coulomb-nuclear interference region with the 200-GeV/c polarized-proton beam at Fermilab.

Author

Akchurin N, Langland J, Onel Y, Bonner BE, Corcoran MD, Cranshaw J, Nessi-Tedaldi F, Nessi M, Nguyen C, Roberts JB, Skeens J, White JL, Bravar A, Giacomich R, Penzo A, Schiavon P, Zanetti A, Bystricky J, Lehar F, de Lesquen A, van Rossum L, Cossairt JD, Read AL, Derevschikov AA, Matulenko YA, Meschanin AP, Nurushev SB, Patalakha DI, Rykov VL, Solovyanov VL, Vasiliev AN, Grosnick DP, Hill DA, Laghai M, Lopiano D, Ohashi Y, Shima T, Spinka H, Stanek RW, Underwood DG, Yokosawa A, Funahashi H, Goto Y, Imai K, Itow Y, Makino S, Masaike A, Miyake K, Nagamine T, Saito N, Yamashita S, Iwatani K, Kuroda K, Michalowicz A, Luehring FC, Miller DH, Maki T, Pauletta G, Rappazzo GF, Salvato G, Takashima R, and Takeutchi F

Published
1993
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