Precision measurement of the mass and lifetime of the Ξ(b)(0) baryon

Aaij, R. et al. (2014) Precision measurement of the mass and lifetime of the Ξ(b)(0) baryon. Physical Review Letters, 113, 032001. (doi:10.1103/PhysRevLett.113.032001) (PMID:25083633)

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Abstract

Using a proton-proton collision data sample corresponding to an integrated luminosity of 3  fb−1 collected by LHCb at center-of-mass energies of 7 and 8 TeV, about 3800 Ξ0b→Ξ+cπ−, Ξ+c→pK−π+ signal decays are reconstructed. From this sample, the first measurement of the Ξ0b baryon lifetime is made, relative to that of the Λ0b baryon. The mass differences M(Ξ0b)−M(Λ0b) and M(Ξ+c)−M(Λ+c) are also measured with precision more than 4 times better than the current world averages. The resulting values are τΞ0bτΛ0b=1.006±0.018±0.010,M(Ξ0b)−M(Λ0b)=172.44±0.39±0.17  MeV/c2,M(Ξ+c)−M(Λ+c)=181.51±0.14±0.10  MeV/c2, where the first uncertainty is statistical and the second is systematic. The relative rate of Ξ0b to Λ0b baryon production is measured to be fΞ0bfΛ0bB(Ξ0b→Ξ+cπ−)B(Λ0b→Λ+cπ−)B(Ξ+c→pK−π+)B(Λ+c→pK−π+)=(1.88±0.04±0.03)×10−2, where the first factor is the ratio of fragmentation fractions, b→Ξ0b relative to b→Λ0b. Relative production rates as functions of transverse momentum and pseudorapidity are also presented.

Item Type:Articles
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Pappagallo, Dr Marco and Alexander, Mr Michael and Sail, Mr Paul and Spradlin, Dr Patrick and Ogilvy, Mr Stephen and Soler, Professor Paul and Borghi, Dr Silvia and Eklund, Dr Lars and Hynds, Mr Daniel
Authors: Aaij, R., Adeva, B., Adinolfi, M., Affolder, A., Ajaltouni, Z., Albrecht, J., Alessio, F., Alexander, M., Ali, S., Alkhazov, G., Cartelle, P. A., Alves, A. A., Amato, S., Amerio, S., Amhis, Y., Anderlini, L., Anderson, J., Andreassen, R., Andreotti, M., Andrews, J. E., Appleby, R. B., Gutierrez, O. A., Archilli, F., Artamonov, A., Artuso, M., Aslanides, E., Auriemma, G., Baalouch, M., Bachmann, S., Back, J. J., Badalov, A., Balagura, V., Baldini, W., Barlow, R. J., Barschel, C., Barsuk, S., Barter, W., Batozskaya, V., Bauer, T., Bay, A., Beddow, J., Bedeschi, F., Bediaga, I., Belogurov, S., Belous, K., Belyaev, I., Ben-Haim, E., Bencivenni, G., Benson, S., Benton, J., Berezhnoy, A., Bernet, R., Bettler, M. -O., van Beuzekom, M., Bien, A., Bifani, S., Bird, T., Bizzeti, A., Bjørnstad, P. M., Blake, T., Blanc, F., Blouw, J., Blusk, S., Bocci, V., Bondar, A., Bondar, N., Bonivento, W., Borghi, S., Borgia, A., Borsato, M., Bowcock, T. J. V., Bowen, E., Bozzi, C., Brambach, T., van den Brand, J., Bressieux, J., Brett, D., Britsch, M., Britton, T., Brook, N. H., Brown, H., Bursche, A., Busetto, G., Buytaert, J., Cadeddu, S., Calabrese, R., Callot, O., Calvi, M., Gomez, M. C., Camboni, A., Campana, P., Perez, D. C., Carbone, A., Carboni, G., Cardinale, R., Cardini, A., Carranza-Mejia, H., Carson, L., Akiba, K. C., Casse, G., Garcia, L. C., Cattaneo, M., Cauet, C., Cenci, R., Charles, M., Charpentier, P., Cheung, S.-F., Chiapolini, N., Chrzaszcz, M., Ciba, K., Vidal, X. C., Ciezarek, G., Clarke, P. E. L., Clemencic, M., Cliff, H. V., Closier, J., Coca, C., Coco, V., Cogan, J., Cogneras, E., Collins, P., Comerma-Montells, A., Contu, A., Cook, A., Coombes, M., Coquereau, S., Corti, G., Couturier, B., Cowan, G. A., Craik, D. C., Torres, M. C., Cunliffe, S., Currie, R., D’Ambrosio, C., Dalseno, J., David, P., David, P. N. Y., Davis, A., De Bonis, I., De Bruyn, K., De Capua, S., De Cian, M., De Miranda, J. M., De Paula, L., De Silva, W., De Simone, P., Decamp, D., Deckenhoff, M., Buono, L. D., Déléage, N., Derkach, D., Deschamps, O., Dettori, F., Canto, A. D., Dijkstra, H., Donleavy, S., Dordei, F., Dorosz, P., Suárez, A. D., Dossett, D., Dovbnya, A., Dupertuis, F., Durante, P., Dzhelyadin, R., Dziurda, A., Dzyuba, A., Easo, S., Egede, U., Egorychev, V., Eidelman, S., van Eijk, D., Eisenhardt, S., Eitschberger, U., Ekelhof, R., Eklund, L., Rifai, I. E., Elsasser, C., Falabella, A., Färber, C., Farinelli, C., Farry, S., Ferguson, D., Albor, V. F., Rodrigues, F. F., Ferro-Luzzi, M., Filippov, S., Fiore, M., Fiorini, M., Fitzpatrick, C., Fontana, M., Fontanelli, F., Forty, R., Francisco, O., Frank, M., Frei, C., Frosini, M., Furfaro, E., Torreira, A. G., Galli, D., Gandelman, M., Gandini, P., Gao, Y., Garofoli, J., Garosi, P., Tico, J. G., Garrido, L., Gaspar, C., Gauld, R., Gersabeck, E., Gersabeck, M., Gershon, T., Ghez, P., Gianelle, A., Gibson, V., Giubega, L., Gligorov, V. V., Göbel, C., Golubkov, D., Golutvin, A., Gomes, A., Gordon, H., Gándara, M. G., Diaz, R. G., Cardoso, L. A. G., Graugés, E., Graziani, G., Grecu, A., Greening, E., Gregson, S., Griffith, P., Grillo, L., Grünberg, O., Gui, B., Gushchin, E., Guz, Y., Gys, T., Hadjivasiliou, C., Haefeli, G., Haen, C., Hafkenscheid, T. W., Haines, S. C., Hall, S., Hamilton, B., Hampson, T., Hansmann-Menzemer, S., Harnew, N., Harnew, S. T., Harrison, J., Hartmann, T., He, J., Head, T., Heijne, V., Hennessy, K., Henrard, P., Morata, J. A. H., van Herwijnen, E., Heß, M., Hicheur, A., Hill, D., Hoballah, M., Hombach, C., Hulsbergen, W., Hunt, P., Huse, T., Hussain, N., Hutchcroft, D., Hynds, D., Iakovenko, V., Idzik, M., Ilten, P., Jacobsson, R., Jaeger, A., Jans, E., Jaton, P., Jawahery, A., Jing, F., John, M., Johnson, D., Jones, C. R., Joram, C., Jost, B., Jurik, N., Kaballo, M., Kandybei, S., Kanso, W., Karacson, M., Karbach, T. M., Kenyon, I. R., Ketel, T., Khanji, B., Klaver, S., Kochebina, O., Komarov, I., Koopman, R. F., Koppenburg, P., Korolev, M., Kozlinskiy, A., Kravchuk, L., Kreplin, K., Kreps, M., Krocker, G., Krokovny, P., Kruse, F., Kucharczyk, M., Kudryavtsev, V., Kurek, K., Kvaratskheliya, T., Thi, V. N. L., Lacarrere, D., Lafferty, G., Lai, A., Lambert, D., Lambert, R. W., Lanciotti, E., Lanfranchi, G., Langenbruch, C., Latham, T., Lazzeroni, C., Le Gac, R., van Leerdam, J., Lees, J.-P., Lefèvre, R., Leflat, A., Lefrançois, J., Leo, S., Leroy, O., Lesiak, T., Leverington, B., Li, Y., Liles, M., Lindner, R., Linn, C., Lionetto, F., Liu, B., Liu, G., Lohn, S., Longstaff, I., Lopes, J. H., Lopez-March, N., Lowdon, P., Lu, H., Lucchesi, D., Luisier, J., Luo, H., Luppi, E., Lupton, O., Machefert, F., Machikhiliyan, I. V., Maciuc, F., Maev, O., Malde, S., Manca, G., Mancinelli, G., Maratas, J., Marconi, U., Marino, P., Märki, R., Marks, J., Martellotti, G., Martens, A., Sánchez, A. M., Martinelli, M., Santos, D. 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D., Patel, M., Patrignani, C., Pavel-Nicorescu, C., Alvarez, A. P., Pearce, A., Pellegrino, A., Penso, G., Altarelli, M. P., Perazzini, S., Trigo, E. P., Perret, P., Perrin-Terrin, M., Pescatore, L., Pesen, E., Pessina, G., Petridis, K., Petrolini, A., Olloqui, E. P., Pietrzyk, B., Pilař, T., Pinci, D., Pistone, A., Playfer, S., Casasus, M. P., Polci, F., Polok, G., Poluektov, A., Polycarpo, E., Popov, A., Popov, D., Popovici, B., Potterat, C., Powell, A., Prisciandaro, J., Pritchard, A., Prouve, C., Pugatch, V., Navarro, A. P., Punzi, G., Qian, W., Rachwal, B., Rademacker, J. H., Rakotomiaramanana, B., Rama, M., Rangel, M. S., Raniuk, I., Rauschmayr, N., Raven, G., Redford, S., Reichert, S., Reid, M. M., Reis, A. C. d., Ricciardi, S., Richards, A., Rinnert, K., Molina, V. R., Romero, D. A. R., Robbe, P., Roberts, D. A., Rodrigues, A. B., Rodrigues, E., Perez, P. R., Roiser, S., Romanovsky, V., Vidal, A. R., Rotondo, M., Rouvinet, J., Ruf, T., Ruffini, F., Ruiz, H., Valls, P. R., Sabatino, G., Silva, J. J. S., Sagidova, N., Sail, P., Saitta, B., Guimaraes, V. S., Sedes, B. S., Santacesaria, R., Rios, C. S., Santovetti, E., Sapunov, M., Sarti, A., Satriano, C., Satta, A., Savrie, M., Savrina, D., Schiller, M., Schindler, H., Schlupp, M., Schmelling, M., Schmidt, B., Schneider, O., Schopper, A., Schune, M.-H., Schwemmer, R., Sciascia, B., Sciubba, A., Seco, M., Semennikov, A., Senderowska, K., Sepp, I., Serra, N., Serrano, J., Seyfert, P., Shapkin, M., Shapoval, I., Shcheglov, Y., Shears, T., Shekhtman, L., Shevchenko, O., Shevchenko, V., Shires, A., Coutinho, R. S., Simi, G., Sirendi, M., Skidmore, N., Skwarnicki, T., Smith, N. A., Smith, E., Smith, E., Smith, J., Smith, M., Sokoloff, M. D., Soler, F.J.P., Soomro, F., Souza, D., De Paula, B. S., Spaan, B., Sparkes, A., Spradlin, P., Stagni, F., Stahl, S., Steinkamp, O., Stevenson, S., Stoica, S., Stone, S., Storaci, B., Stracka, S., Straticiuc, M., Straumann, U., Stroili, R., Subbiah, V. K., Sun, L., Sutcliffe, W., Swientek, S., Syropoulos, V., Szczekowski, M., Szczypka, P., Szilard, D., Szumlak, T., T’Jampens, S., Teklishyn, M., Tellarini, G., Teodorescu, E., Teubert, F., Thomas, C., Thomas, E., van Tilburg, J., Tisserand, V., Tobin, M., Tolk, S., Tomassetti, L., Tonelli, D., Topp-Joergensen, S., Torr, N., Tournefier, E., Tourneur, S., Tran, M. T., Tresch, M., Tsaregorodtsev, A., Tsopelas, P., Tuning, N., Garcia, M. U., Ukleja, A., Ustyuzhanin, A., Uwer, U., Vagnoni, V., Valenti, G., Vallier, A., Gomez, R. V., Regueiro, P. V., Sierra, C. V., Vecchi, S., Velthuis, J. J., Veltri, M., Veneziano, G., Vesterinen, M., Viaud, B., Vieira, D., Vilasis-Cardona, X., Vollhardt, A., Volyanskyy, D., Voong, D., Vorobyev, A., Vorobyev, V., Voß, C., Voss, H., de Vries, J. A., Waldi, R., Wallace, C., Wallace, R., Wandernoth, S., Wang, J., Ward, D. R., Watson, N. K., Webber, A. D., Websdale, D., Whitehead, M., Wicht, J., Wiechczynski, J., Wiedner, D., Wiggers, L., Wilkinson, G., Williams, M. P., Williams, M., Wilson, F. F., Wimberley, J., Wishahi, J., Wislicki, W., Witek, M., Wormser, G., Wotton, S. A., Wright, S., Wu, S., Wyllie, K., Xie, Y., Xing, Z., Yang, Z., Yuan, X., Yushchenko, O., Zangoli, M., Zavertyaev, M., Zhang, F., Zhang, L., Zhang, W. C., Zhang, Y., Zhelezov, A., Zhokhov, A., Zhong, L., and Zvyagin, A.
College/School:College of Science and Engineering > School of Physics and Astronomy
Journal Name:Physical Review Letters
Publisher:American Physical Society
ISSN:0031-9007
ISSN (Online):1079-7114
Copyright Holders:Copyright © 2014 CERN on behalf of the LHCb Collaboration.
First Published:First published in Physical Review Letters 113:032001
Publisher Policy:Reproduced under a Creative Commons License

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