Measurement of B0B0 mixing in hadronic Z0 decays. OPAL collaboration

OPAL Collaboration

doi:10.1016/0370-2693(92)90335-2

Measurement of B⁰B⁰ mixing in hadronic Z⁰ decays. OPAL collaboration

OPAL Collaboration

Physics and Astronomy

Stony Brook University

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

23 Scopus citations

Abstract

From a sample of approximately 135 000 hadronic Z⁰ decays recorded with the OPAL detector, 1 536 events were selected with two lepton candidates, either electrons or muons. A signal for B⁰B⁰ mixing was observed using the sign of the lepton charge to tag the charge of the b quark in decaying b-flavoured hadrons. A flavour discriminating variable was constructed from the lepton momentum and its component perpendicular to the jet axis. By fitting the fraction of events in which the two lepton charges are of the same sign, as a function of this variable, the average mixing parameter was measured to be χ = 0.145^+0.041 _-0.035 ± 0.018, where the first error is statistical and the second is systematic.

Original language	English
Pages (from-to)	379-392
Number of pages	14
Journal	Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume	276
Issue number	3
DOIs	https://doi.org/10.1016/0370-2693(92)90335-2
State	Published - Feb 13 1992

Access to Document

10.1016/0370-2693(92)90335-2

Cite this

@article{747fc8654a6c4efaad930f3f09f32141,

title = "Measurement of B0B0 mixing in hadronic Z0 decays. OPAL collaboration",

abstract = "From a sample of approximately 135 000 hadronic Z0 decays recorded with the OPAL detector, 1 536 events were selected with two lepton candidates, either electrons or muons. A signal for B0B0 mixing was observed using the sign of the lepton charge to tag the charge of the b quark in decaying b-flavoured hadrons. A flavour discriminating variable was constructed from the lepton momentum and its component perpendicular to the jet axis. By fitting the fraction of events in which the two lepton charges are of the same sign, as a function of this variable, the average mixing parameter was measured to be χ = 0.145+0.041 -0.035 ± 0.018, where the first error is statistical and the second is systematic.",

author = "\{OPAL Collaboration\} and Acton, \{P. D.\} and G. Alexander and J. Allison and Allport, \{P. P.\} and Anderson, \{K. J.\} and S. Arcelli and P. Ashton and A. Astbury and D. Axen and G. Azuelos and Bahan, \{G. A.\} and Baines, \{J. T.M.\} and Ball, \{A. H.\} and J. Banks and Barker, \{G. J.\} and Barlow, \{R. J.\} and Batley, \{J. R.\} and G. Beaudoin and A. Beck and J. Becker and T. Behnke and Bell, \{K. W.\} and G. Bella and P. Berlich and S. Bethke and O. Biebel and U. Binder and Bloodworth, \{I. J.\} and P. Bock and B. Boden and Bosch, \{H. M.\} and S. Bougerolle and Brabson, \{B. B.\} and H. Breuker and Brown, \{R. M.\} and R. Brun and A. Buijs and Burckhart, \{H. J.\} and P. Capiluppi and Carnegie, \{R. K.\} and Carter, \{A. A.\} and Carter, \{J. R.\} and Chang, \{C. Y.\} and Charlton, \{D. G.\} and Clarke, \{P. E.L.\} and I. Cohen and Collins, \{W. J.\} and Conboy, \{J. E.\} and M. Cooper and Hobbs, \{J. D.\}",

year = "1992",

month = feb,

day = "13",

doi = "10.1016/0370-2693(92)90335-2",

language = "English",

volume = "276",

pages = "379--392",

journal = "Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics",

issn = "0370-2693",

number = "3",

}

TY - JOUR

T1 - Measurement of B0B0 mixing in hadronic Z0 decays. OPAL collaboration

AU - OPAL Collaboration

AU - Acton, P. D.

AU - Alexander, G.

AU - Allison, J.

AU - Allport, P. P.

AU - Anderson, K. J.

AU - Arcelli, S.

AU - Ashton, P.

AU - Astbury, A.

AU - Axen, D.

AU - Azuelos, G.

AU - Bahan, G. A.

AU - Baines, J. T.M.

AU - Ball, A. H.

AU - Banks, J.

AU - Barker, G. J.

AU - Barlow, R. J.

AU - Batley, J. R.

AU - Beaudoin, G.

AU - Beck, A.

AU - Becker, J.

AU - Behnke, T.

AU - Bell, K. W.

AU - Bella, G.

AU - Berlich, P.

AU - Bethke, S.

AU - Biebel, O.

AU - Binder, U.

AU - Bloodworth, I. J.

AU - Bock, P.

AU - Boden, B.

AU - Bosch, H. M.

AU - Bougerolle, S.

AU - Brabson, B. B.

AU - Breuker, H.

AU - Brown, R. M.

AU - Brun, R.

AU - Buijs, A.

AU - Burckhart, H. J.

AU - Capiluppi, P.

AU - Carnegie, R. K.

AU - Carter, A. A.

AU - Carter, J. R.

AU - Chang, C. Y.

AU - Charlton, D. G.

AU - Clarke, P. E.L.

AU - Cohen, I.

AU - Collins, W. J.

AU - Conboy, J. E.

AU - Cooper, M.

AU - Hobbs, J. D.

PY - 1992/2/13

Y1 - 1992/2/13

N2 - From a sample of approximately 135 000 hadronic Z0 decays recorded with the OPAL detector, 1 536 events were selected with two lepton candidates, either electrons or muons. A signal for B0B0 mixing was observed using the sign of the lepton charge to tag the charge of the b quark in decaying b-flavoured hadrons. A flavour discriminating variable was constructed from the lepton momentum and its component perpendicular to the jet axis. By fitting the fraction of events in which the two lepton charges are of the same sign, as a function of this variable, the average mixing parameter was measured to be χ = 0.145+0.041 -0.035 ± 0.018, where the first error is statistical and the second is systematic.

AB - From a sample of approximately 135 000 hadronic Z0 decays recorded with the OPAL detector, 1 536 events were selected with two lepton candidates, either electrons or muons. A signal for B0B0 mixing was observed using the sign of the lepton charge to tag the charge of the b quark in decaying b-flavoured hadrons. A flavour discriminating variable was constructed from the lepton momentum and its component perpendicular to the jet axis. By fitting the fraction of events in which the two lepton charges are of the same sign, as a function of this variable, the average mixing parameter was measured to be χ = 0.145+0.041 -0.035 ± 0.018, where the first error is statistical and the second is systematic.

UR - https://www.scopus.com/pages/publications/0040679412

U2 - 10.1016/0370-2693(92)90335-2

DO - 10.1016/0370-2693(92)90335-2

M3 - Article

SN - 0370-2693

VL - 276

SP - 379

EP - 392

JO - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

JF - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

IS - 3

ER -

Measurement of B⁰B⁰ mixing in hadronic Z⁰ decays. OPAL collaboration

Abstract

Access to Document

Other files and links

Fingerprint

Cite this