Observation of the semileptonic decays of BS and Λb hadrons at LEP

D. Buskulic; D. Decamp; C. Goy; J. P. Lees; M. N. Minard; B. Mours; R. Alemany; F. Ariztizabal; P. Comas; J. M. Crespo; M. Delfino; E. Fernandez; V. Gaitan; Ll Garrido; A. Pacheco; A. Pascual; D. Creanza; M. de Palma; A. Farilla; G. Iaselli; G. Maggi; M. Maggi; S. Natali; S. Nuzzo; M. Quattromini; A. Ranieri; G. Raso; F. Romano; F. Ruggieri; G. Selvaggi; L. Silvestris; P. Tempesta; G. Zito; Y. Gao; H. Hu; D. Huang; X. Huang; J. Lin; J. Lou; C. Qiao; T. Wang; Y. Xie; D. Xu; R. Xu; J. Zhang; W. Zhao; W. B. Atwood; L. A.T. Bauerdick; E. Blucher; G. Bonvicini; F. Bossi; J. Boudreau; T. H. Burnett; H. Drevermann; R. W. Forty; R. Hagelberg; J. Harvey; S. Haywood; J. Hilgart; R. Jacobsen; B. Jost; J. Knobloch; E. Lançon; I. Lehraus; T. Lohse; A. Lusiani; M. Martinez; P. Mato; T. Mattison; H. Meinhard; S. Menary; T. Meyer; A. Minten; R. Miquel; H. G. Moser; J. Nash; P. Palazzi; J. A. Perlas; F. Ranjard; G. Redlinger; L. Rolandi; A. Roth; J. Rothberg; T. Ruan; M. Saich; D. Schlatter; M. Schmelling; F. Sefkow; W. Tejessy; H. Wachsmuth; W. Wiedenmann; T. Wildish; W. Witzeling; J. Wotschack; Z. Ajaltouni; F. Badaud; M. Bardadin-Otwinowska; A. M. Bencheikh; R. El Fellous; A. Falvard

doi:10.1016/0370-2693(92)91654-R

Observation of the semileptonic decays of BS and Λb hadrons at LEP

D. Buskulic, D. Decamp, C. Goy, J. P. Lees, M. N. Minard, B. Mours, R. Alemany, F. Ariztizabal, P. Comas, J. M. Crespo, M. Delfino, E. Fernandez, V. Gaitan, Ll Garrido, A. Pacheco, A. Pascual, D. Creanza, M. de Palma, A. Farilla, G. IaselliG. Maggi, M. Maggi, S. Natali, S. Nuzzo, M. Quattromini, A. Ranieri, G. Raso, F. Romano, F. Ruggieri, G. Selvaggi, L. Silvestris, P. Tempesta, G. Zito, Y. Gao, H. Hu, D. Huang, X. Huang, J. Lin, J. Lou, C. Qiao, T. Wang, Y. Xie, D. Xu, R. Xu, J. Zhang, W. Zhao, W. B. Atwood, L. A.T. Bauerdick, E. Blucher, G. Bonvicini, F. Bossi, J. Boudreau, T. H. Burnett, H. Drevermann, R. W. Forty, R. Hagelberg, J. Harvey, S. Haywood, J. Hilgart, R. Jacobsen, B. Jost, J. Knobloch, E. Lançon, I. Lehraus, T. Lohse, A. Lusiani, M. Martinez, P. Mato, T. Mattison, H. Meinhard, S. Menary, T. Meyer, A. Minten, R. Miquel, H. G. Moser, J. Nash, P. Palazzi, J. A. Perlas, F. Ranjard, G. Redlinger, L. Rolandi, A. Roth, J. Rothberg, T. Ruan, M. Saich, D. Schlatter, M. Schmelling, F. Sefkow, W. Tejessy, H. Wachsmuth, W. Wiedenmann, T. Wildish, W. Witzeling, J. Wotschack, Z. Ajaltouni, F. Badaud, M. Bardadin-Otwinowska, A. M. Bencheikh, R. El Fellous, A. Falvard

Research output: Contribution to journal › Article › Research › peer-review

37 Citations (Scopus)

Abstract

In 450 000 hadronic Z decays recorded with the ALEPH detector at LEP, the yields of Ds-ℓ+ and Λc+ℓ- combinations have been measured. 16.0 ± 4.3 Ds-ℓ+ combinations were observed in the Ds- → ππ- channel and 17.0 ± 4.5 combinations were observed in the Ds- → K*0K- channel. 21.0 ± 5.0 Λc+ℓ- combinations were observed, with the Λc+ reconstructed in the decay mode Λc+ → pK-π+. These events provide evidence for the decays Bs → Ds-Xℓ+ν and Λb → Λc+Xℓ-ν. Assuming that the Bs and Λb semileptonic decays are dominantly three-body, these observed yields, after background subtraction, translate into the following product branching ratios: Br(b → Bs)Br(Bs → Ds-Xℓ+ν) = 0.040±0.011 -0.012+0.010, Br(b → Λb)Br(Λb → Λc+Xℓ-ν) = 0.030±0.007±0.009. © 1992.

Original language	English
Pages (from-to)	145-156
Journal	Physics Letters B
Volume	294
DOIs	https://doi.org/10.1016/0370-2693(92)91654-R
Publication status	Published - 5 Nov 1992

Access to Document

10.1016/0370-2693(92)91654-R

Cite this

Buskulic, D., Decamp, D., Goy, C., Lees, J. P., Minard, M. N., Mours, B., Alemany, R., Ariztizabal, F., Comas, P., Crespo, J. M., Delfino, M., Fernandez, E., Gaitan, V., Garrido, L., Pacheco, A., Pascual, A., Creanza, D., de Palma, M., Farilla, A., ... Falvard, A. (1992). Observation of the semileptonic decays of BS and Λb hadrons at LEP. Physics Letters B, 294, 145-156. https://doi.org/10.1016/0370-2693(92)91654-R

@article{f362ee513c7849eeb066db21e6af297c,

title = "Observation of the semileptonic decays of BS and Λb hadrons at LEP",

abstract = "In 450 000 hadronic Z decays recorded with the ALEPH detector at LEP, the yields of Ds-ℓ+ and Λc+ℓ- combinations have been measured. 16.0 ± 4.3 Ds-ℓ+ combinations were observed in the Ds- → ππ- channel and 17.0 ± 4.5 combinations were observed in the Ds- → K*0K- channel. 21.0 ± 5.0 Λc+ℓ- combinations were observed, with the Λc+ reconstructed in the decay mode Λc+ → pK-π+. These events provide evidence for the decays Bs → Ds-Xℓ+ν and Λb → Λc+Xℓ-ν. Assuming that the Bs and Λb semileptonic decays are dominantly three-body, these observed yields, after background subtraction, translate into the following product branching ratios: Br(b → Bs)Br(Bs → Ds-Xℓ+ν) = 0.040±0.011 -0.012+0.010, Br(b → Λb)Br(Λb → Λc+Xℓ-ν) = 0.030±0.007±0.009. {\textcopyright} 1992.",

author = "D. Buskulic and D. Decamp and C. Goy and Lees, {J. P.} and Minard, {M. N.} and B. Mours and R. Alemany and F. Ariztizabal and P. Comas and Crespo, {J. M.} and M. Delfino and E. Fernandez and V. Gaitan and Ll Garrido and A. Pacheco and A. Pascual and D. Creanza and {de Palma}, M. and A. Farilla and G. Iaselli and G. Maggi and M. Maggi and S. Natali and S. Nuzzo and M. Quattromini and A. Ranieri and G. Raso and F. Romano and F. Ruggieri and G. Selvaggi and L. Silvestris and P. Tempesta and G. Zito and Y. Gao and H. Hu and D. Huang and X. Huang and J. Lin and J. Lou and C. Qiao and T. Wang and Y. Xie and D. Xu and R. Xu and J. Zhang and W. Zhao and Atwood, {W. B.} and Bauerdick, {L. A.T.} and E. Blucher and G. Bonvicini and F. Bossi and J. Boudreau and Burnett, {T. H.} and H. Drevermann and Forty, {R. W.} and R. Hagelberg and J. Harvey and S. Haywood and J. Hilgart and R. Jacobsen and B. Jost and J. Knobloch and E. Lan{\c c}on and I. Lehraus and T. Lohse and A. Lusiani and M. Martinez and P. Mato and T. Mattison and H. Meinhard and S. Menary and T. Meyer and A. Minten and R. Miquel and Moser, {H. G.} and J. Nash and P. Palazzi and Perlas, {J. A.} and F. Ranjard and G. Redlinger and L. Rolandi and A. Roth and J. Rothberg and T. Ruan and M. Saich and D. Schlatter and M. Schmelling and F. Sefkow and W. Tejessy and H. Wachsmuth and W. Wiedenmann and T. Wildish and W. Witzeling and J. Wotschack and Z. Ajaltouni and F. Badaud and M. Bardadin-Otwinowska and Bencheikh, {A. M.} and {El Fellous}, R. and A. Falvard",

year = "1992",

month = nov,

day = "5",

doi = "10.1016/0370-2693(92)91654-R",

language = "English",

volume = "294",

pages = "145--156",

journal = "Physics Letters B",

issn = "0370-2693",

publisher = "Elsevier",

}

Buskulic, D, Decamp, D, Goy, C, Lees, JP, Minard, MN, Mours, B, Alemany, R, Ariztizabal, F, Comas, P, Crespo, JM , Delfino, M , Fernandez, E, Gaitan, V, Garrido, L, Pacheco, A, Pascual, A, Creanza, D, de Palma, M, Farilla, A, Iaselli, G, Maggi, G, Maggi, M, Natali, S, Nuzzo, S, Quattromini, M, Ranieri, A, Raso, G, Romano, F, Ruggieri, F, Selvaggi, G, Silvestris, L, Tempesta, P, Zito, G, Gao, Y, Hu, H, Huang, D, Huang, X, Lin, J, Lou, J, Qiao, C, Wang, T, Xie, Y, Xu, D, Xu, R, Zhang, J, Zhao, W, Atwood, WB, Bauerdick, LAT, Blucher, E, Bonvicini, G, Bossi, F, Boudreau, J, Burnett, TH, Drevermann, H, Forty, RW, Hagelberg, R, Harvey, J, Haywood, S, Hilgart, J, Jacobsen, R, Jost, B, Knobloch, J, Lançon, E, Lehraus, I, Lohse, T, Lusiani, A, Martinez, M, Mato, P, Mattison, T, Meinhard, H, Menary, S, Meyer, T, Minten, A, Miquel, R, Moser, HG, Nash, J, Palazzi, P, Perlas, JA, Ranjard, F, Redlinger, G, Rolandi, L, Roth, A, Rothberg, J, Ruan, T, Saich, M, Schlatter, D, Schmelling, M, Sefkow, F, Tejessy, W, Wachsmuth, H, Wiedenmann, W, Wildish, T, Witzeling, W, Wotschack, J, Ajaltouni, Z, Badaud, F, Bardadin-Otwinowska, M, Bencheikh, AM, El Fellous, R & Falvard, A 1992, 'Observation of the semileptonic decays of BS and Λb hadrons at LEP', Physics Letters B, vol. 294, pp. 145-156. https://doi.org/10.1016/0370-2693(92)91654-R

TY - JOUR

T1 - Observation of the semileptonic decays of BS and Λb hadrons at LEP

AU - Buskulic, D.

AU - Decamp, D.

AU - Goy, C.

AU - Lees, J. P.

AU - Minard, M. N.

AU - Mours, B.

AU - Alemany, R.

AU - Ariztizabal, F.

AU - Comas, P.

AU - Crespo, J. M.

AU - Delfino, M.

AU - Fernandez, E.

AU - Gaitan, V.

AU - Garrido, Ll

AU - Pacheco, A.

AU - Pascual, A.

AU - Creanza, D.

AU - de Palma, M.

AU - Farilla, A.

AU - Iaselli, G.

AU - Maggi, G.

AU - Maggi, M.

AU - Natali, S.

AU - Nuzzo, S.

AU - Quattromini, M.

AU - Ranieri, A.

AU - Raso, G.

AU - Romano, F.

AU - Ruggieri, F.

AU - Selvaggi, G.

AU - Silvestris, L.

AU - Tempesta, P.

AU - Zito, G.

AU - Gao, Y.

AU - Hu, H.

AU - Huang, D.

AU - Huang, X.

AU - Lin, J.

AU - Lou, J.

AU - Qiao, C.

AU - Wang, T.

AU - Xie, Y.

AU - Xu, D.

AU - Xu, R.

AU - Zhang, J.

AU - Zhao, W.

AU - Atwood, W. B.

AU - Bauerdick, L. A.T.

AU - Blucher, E.

AU - Bonvicini, G.

AU - Bossi, F.

AU - Boudreau, J.

AU - Burnett, T. H.

AU - Drevermann, H.

AU - Forty, R. W.

AU - Hagelberg, R.

AU - Harvey, J.

AU - Haywood, S.

AU - Hilgart, J.

AU - Jacobsen, R.

AU - Jost, B.

AU - Knobloch, J.

AU - Lançon, E.

AU - Lehraus, I.

AU - Lohse, T.

AU - Lusiani, A.

AU - Martinez, M.

AU - Mato, P.

AU - Mattison, T.

AU - Meinhard, H.

AU - Menary, S.

AU - Meyer, T.

AU - Minten, A.

AU - Miquel, R.

AU - Moser, H. G.

AU - Nash, J.

AU - Palazzi, P.

AU - Perlas, J. A.

AU - Ranjard, F.

AU - Redlinger, G.

AU - Rolandi, L.

AU - Roth, A.

AU - Rothberg, J.

AU - Ruan, T.

AU - Saich, M.

AU - Schlatter, D.

AU - Schmelling, M.

AU - Sefkow, F.

AU - Tejessy, W.

AU - Wachsmuth, H.

AU - Wiedenmann, W.

AU - Wildish, T.

AU - Witzeling, W.

AU - Wotschack, J.

AU - Ajaltouni, Z.

AU - Badaud, F.

AU - Bardadin-Otwinowska, M.

AU - Bencheikh, A. M.

AU - El Fellous, R.

AU - Falvard, A.

PY - 1992/11/5

Y1 - 1992/11/5

N2 - In 450 000 hadronic Z decays recorded with the ALEPH detector at LEP, the yields of Ds-ℓ+ and Λc+ℓ- combinations have been measured. 16.0 ± 4.3 Ds-ℓ+ combinations were observed in the Ds- → ππ- channel and 17.0 ± 4.5 combinations were observed in the Ds- → K*0K- channel. 21.0 ± 5.0 Λc+ℓ- combinations were observed, with the Λc+ reconstructed in the decay mode Λc+ → pK-π+. These events provide evidence for the decays Bs → Ds-Xℓ+ν and Λb → Λc+Xℓ-ν. Assuming that the Bs and Λb semileptonic decays are dominantly three-body, these observed yields, after background subtraction, translate into the following product branching ratios: Br(b → Bs)Br(Bs → Ds-Xℓ+ν) = 0.040±0.011 -0.012+0.010, Br(b → Λb)Br(Λb → Λc+Xℓ-ν) = 0.030±0.007±0.009. © 1992.

AB - In 450 000 hadronic Z decays recorded with the ALEPH detector at LEP, the yields of Ds-ℓ+ and Λc+ℓ- combinations have been measured. 16.0 ± 4.3 Ds-ℓ+ combinations were observed in the Ds- → ππ- channel and 17.0 ± 4.5 combinations were observed in the Ds- → K*0K- channel. 21.0 ± 5.0 Λc+ℓ- combinations were observed, with the Λc+ reconstructed in the decay mode Λc+ → pK-π+. These events provide evidence for the decays Bs → Ds-Xℓ+ν and Λb → Λc+Xℓ-ν. Assuming that the Bs and Λb semileptonic decays are dominantly three-body, these observed yields, after background subtraction, translate into the following product branching ratios: Br(b → Bs)Br(Bs → Ds-Xℓ+ν) = 0.040±0.011 -0.012+0.010, Br(b → Λb)Br(Λb → Λc+Xℓ-ν) = 0.030±0.007±0.009. © 1992.

U2 - 10.1016/0370-2693(92)91654-R

DO - 10.1016/0370-2693(92)91654-R

M3 - Article

SN - 0370-2693

VL - 294

SP - 145

EP - 156

JO - Physics Letters B

JF - Physics Letters B

ER -

Observation of the semileptonic decays of BS and Λb hadrons at LEP

Abstract

Access to Document

Fingerprint

Cite this