Improved direct measurement of the parity-violation parameter Ab using a mass tag and momentum-weighted track charge.

Improved direct measurement of the parity-violation parameter Ab using a mass tag and momentum-weighted track charge.

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We present an improved direct measurement of the parity-violation parameter A(b) in the Z boson-b-quark coupling using a self-calibrating track-charge technique applied to a sample enriched in Z-->bb events via the topological reconstruction of the B hadron mass. Manipulation of the Stanford...

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Λεπτομέρειες βιβλιογραφικής εγγραφής
Κύριοι συγγραφείς: Abe, K, Abe, T, Adam, I, Akimoto, H, Aston, D, Baird, K, Baltay, C, Band, H, Barklow, T, Bauer, J, Bellodi, G, Berger, R, Blaylock, G, Bogart, JR, Bower, G, Brau, J, Breidenbach, M, Bugg, WM, Burke, D, Burnett, T, Burrows, P, Calcaterra, A, Cassell, R, Chou, A
Μορφή: Journal article
Γλώσσα:English
Έκδοση: 2003
Περιγραφή
Περίληψη:We present an improved direct measurement of the parity-violation parameter A(b) in the Z boson-b-quark coupling using a self-calibrating track-charge technique applied to a sample enriched in Z-->bb events via the topological reconstruction of the B hadron mass. Manipulation of the Stanford Linear Collider electron-beam polarization permits the measurement of A(b) to be made independently of other Z-pole coupling parameters. From the 1996-1998 sample of 400,000 hadronic Z decays, produced with an average beam polarization of 73.4%, we find A(b)=0.906+/-0.022(stat)+/-0.023(syst).

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