Measurement of b-hadron masses

Measurements of b-hadron masses are performed with the exclusive decay modes B+→J/ψK+, B0→J/ψK⁎0, B0→J/ψKS0, Bs0→J/ψϕ and Λb0→J/ψΛ using an integrated luminosity of 35 pb−1 collected in pp collisions at a centre-of-mass energy of 7 TeV by the LHCb experiment. The momentum scale is calibrated with J/...

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Veröffentlicht in:	Physics letters. B 2012-02, Vol.708 (3-5), p.241-248
Hauptverfasser:	Affolder, A., Artamonov, A., Barlow, R.J., Barsuk, S., Belogurov, S., Ben-Haim, E., Benayoun, M., Benson, S., Britsch, M., Cadeddu, S., Ciba, K., Ciezarek, G., Cogan, J., Constantin, F., Cowan, G.A., De Lorenzi, F., Diniz Batista, P., van Eijk, D., Fanchini, E., Fardell, G., Farry, S., Fitzpatrick, C., Gandini, P., Gaspar, C., Graciani Diaz, R., Gui, B., Haefeli, G., Hernando Morata, J.A., van Herwijnen, E., Hunt, P., Jean-Marie, B., Karacson, M., Kerzel, U., Keune, A., Lambert, D., Lambert, R.W., Lesiak, T., Lieng, M., Liles, M., Liu, B., Lopes, J.H., Lopez-March, N., Lu, H., Luisier, J., Machikhiliyan, I.V., Mancinelli, G., Martinez Santos, D., Mazurov, A., McGregor, G., Meissner, M., Messi, R., Milanes, D.A., Morawski, P., Mous, I., Muryn, B., Muster, B., Musy, M., Naik, P., Neufeld, N., Nguyen-Mau, C., Nomerotski, A., Palacios, J., Perego, D.L., Perret, P., Pinci, D., Plackett, R., Poluektov, A., Potterat, C., Prisciandaro, J., Qian, W., Redford, S., Ricciardi, S., Roiser, S., Rouvinet, J., Ruf, T., Sail, P., Santovetti, E., Schleich, S., Schlupp, M., Serrano, J., Shatalov, P., Shcheglov, Y., Smith, A.C., Spaan, B., Subbiah, V.K., Tobin, M., Torr, N., Ukleja, A., Uwer, U., Vorobyev, A., Wandernoth, S., Watson, N.K., Websdale, D., Wishahi, J., Witzeling, W., Xing, Z., Yang, Z., Zhang, F., Zhang, W.C., Zhong, L.
Format:	Artikel
Sprache:	eng
Schlagworte:	Calibration Collisions Decay Elementary particles Energy use Exact sciences and technology High Energy Physics - Experiment Luminosity Nuclear physics Physics The physics of elementary particles and fields
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Beschreibung
Zusammenfassung:	Measurements of b-hadron masses are performed with the exclusive decay modes B+→J/ψK+, B0→J/ψK⁎0, B0→J/ψKS0, Bs0→J/ψϕ and Λb0→J/ψΛ using an integrated luminosity of 35 pb−1 collected in pp collisions at a centre-of-mass energy of 7 TeV by the LHCb experiment. The momentum scale is calibrated with J/ψ→μ+μ− decays and verified to be known to a relative precision of 2 ×10−4 using other two-body decays. The results are more precise than previous measurements, particularly in the case of the Bs0 and Λb0 masses.
ISSN:	0370-2693 1873-2445
DOI:	10.1016/j.physletb.2012.01.058