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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. 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.

4. Meso-Macroporous Hydroxyapatite Powders Synthesized in Polyvinyl Alcohol or Polyvinylpyrrolidone Media.

Author

Antonova OS, Goldberg MA, Fomin AS, Kucheryaev KA, Konovalov AA, Sadovnikova MA, Murzakhanov FF, Sitnikov AI, Leonov AV, Andreeva NA, Khayrutdinova DR, Gafurov MR, Barinov SM, and Komlev VS

Abstract

Mesoporous hydroxyapatite (HA) is widely used in various applications, such as the biomedical field, as a catalytic, as a sensor, and many others. The aim of this work was to obtain HA powders by means of chemical precipitation in a medium containing a polymer-polyvinyl alcohol or polyvinylpyrrolidone (PVP)-with concentrations ranging from 0 to 10%. The HA powders were characterized by X-ray diffraction, Fourier transform infrared spectroscopy, atomic emission spectroscopy with inductively coupled plasma, electron paramagnetic resonance, scanning electron microscopy (SEM), and transmission electron microscopy (TEM). The specific surface area (SSA), pore volume, and pore size distributions were determined by low-temperature nitrogen adsorption measurements, and the zeta potential was established. The formation of macropores in powder agglomerates was determined using SEM and TEM. The synthesis in 10% PVP increased the SSA from 101.3 to 158.0 m 2 /g, while the ripening for 7 days led to an increase from 112.3 to 195.8 m 2 /g, with the total pore volume rising from 0.37 to 0.71 cm 3 /g. These materials could be classified as meso-macroporous HA. Such materials can serve as the basis for various applications requiring improved textural properties and may lay the foundation for the creation of bulk 3D materials using a technique that allows for the preservation of their unique pore structure.

Published
2024
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5. 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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6. 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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7. 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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8. 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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