In a data sample of four million hadronic Z decays collected with the ALEPH detector at LEP, four Lambda(b) baryon candidates are exclusively reconstructed in the Lambda(b) --> Lambda(c)(+) pi(-) channel, with the Lambda(c)(+) decaying into pK(-) pi(+), <p(K)over bar (0)> or Lambda pi(+) pi(+) pi(-). The probability of the observed signal to be due to a background fluctuation is estimated to be 4.2 x 10(-4). The mass of the Lambda(b) is measured to be 5614 +/- 21 (stat.) +/- 4 (syst.) MeV/c(2).

Measurement of the mass of the Lambda(b) baryon / Buskulic, D., Debonis, I., Decamp, D., Ghez, P., Goy, C., Lees, J.p., Lucotte, A., Minard, M.n., Odier, P., Pietrzyk, B., Casado, M.p., Chmeissani, M., Crespo, J.m., Delfino, M., Efthymiopoulos, I., Fernandez, E., Fernandezbosman, M., Garrido, L.i., Juste, A., Martinez, M., et al.. - In: PHYSICS LETTERS. SECTION B. - ISSN 0370-2693. - STAMPA. - 380:3-4(1996), pp. 442-452. [10.1016/0370-2693(96)00659-4]

Measurement of the mass of the Lambda(b) baryon

CREANZA, Donato Maria;IASELLI, Giuseppe;MAGGI, Giorgio Pietro;
1996

Abstract

In a data sample of four million hadronic Z decays collected with the ALEPH detector at LEP, four Lambda(b) baryon candidates are exclusively reconstructed in the Lambda(b) --> Lambda(c)(+) pi(-) channel, with the Lambda(c)(+) decaying into pK(-) pi(+), or Lambda pi(+) pi(+) pi(-). The probability of the observed signal to be due to a background fluctuation is estimated to be 4.2 x 10(-4). The mass of the Lambda(b) is measured to be 5614 +/- 21 (stat.) +/- 4 (syst.) MeV/c(2).
1996
Measurement of the mass of the Lambda(b) baryon / Buskulic, D., Debonis, I., Decamp, D., Ghez, P., Goy, C., Lees, J.p., Lucotte, A., Minard, M.n., Odier, P., Pietrzyk, B., Casado, M.p., Chmeissani, M., Crespo, J.m., Delfino, M., Efthymiopoulos, I., Fernandez, E., Fernandezbosman, M., Garrido, L.i., Juste, A., Martinez, M., et al.. - In: PHYSICS LETTERS. SECTION B. - ISSN 0370-2693. - STAMPA. - 380:3-4(1996), pp. 442-452. [10.1016/0370-2693(96)00659-4]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11589/3472
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