Production rates of b bbar quark pairs from gluons and b bbar b bbar events in hadronic Z° decays

G Abbiendi; Shaun Ashby; Ian Bloodworth; Paul Bright-Thomas; David Charlton; Christopher Hawkes; Roger Homer; Predrag Jovanovic; Alun Lloyd; Thomas McMahon; Stephen O'Neale; Scott Talbot; Miriam Watson; Peter Watkins; Alan Watson; Nigel Watson; John Wilson

doi:10.1007/s100520100580

Production rates of b bbar quark pairs from gluons and b bbar b bbar events in hadronic Z° decays

G Abbiendi, Shaun Ashby, Ian Bloodworth, Paul Bright-Thomas, David Charlton, Christopher Hawkes, Roger Homer, Predrag Jovanovic, Alun Lloyd, Thomas McMahon, Stephen O'Neale, Scott Talbot, Miriam Watson, Peter Watkins, Alan Watson, Nigel Watson, John Wilson

Physics and Astronomy

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19 Citations (Scopus)

Abstract

The rates are measured per hadronic Z(0) decay for gluon splitting to b (b) over bar quark pairs, g(b (b) over bar), and of events containing two b (b) over bar quark pairs, g(4b), using a sample of four-jet events selected from data collected with the OPAL detector. Events with an enhanced signal of gluon splitting to b (b) over bar quarks are selected if two of the jets are close in phase-space and contain detached secondary vertices. For the event sample containing two b (b) over bar quark pairs, three of the four jets are required to have a significantly detached secondary vertex. Information from the event topology is combined in a likelihood fit to extract the values of g(b (b) over bar) and g(4b), namely g(b (b) over bar) = (3.07 +/- 0.53(stat) +/- 0.97(syst)) x 10(-3), g(4b) = (0.36 +/- 0.17(stat) +/- 0.27(syst)) x 10(-3).

Original language	English
Pages (from-to)	447-460
Number of pages	14
Journal	European Physical Journal C
Volume	18
Issue number	3
DOIs	https://doi.org/10.1007/s100520100580
Publication status	Published - 1 Jan 2001

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Abbiendi, G., Ashby, S., Bloodworth, I., Bright-Thomas, P., Charlton, D., Hawkes, C., Homer, R., Jovanovic, P., Lloyd, A., McMahon, T., O'Neale, S., Talbot, S., Watson, M., Watkins, P., Watson, A., Watson, N., & Wilson, J. (2001). Production rates of b bbar quark pairs from gluons and b bbar b bbar events in hadronic Z° decays. European Physical Journal C, 18(3), 447-460. https://doi.org/10.1007/s100520100580

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title = "Production rates of b bbar quark pairs from gluons and b bbar b bbar events in hadronic Z° decays",

abstract = "The rates are measured per hadronic Z(0) decay for gluon splitting to b (b) over bar quark pairs, g(b (b) over bar), and of events containing two b (b) over bar quark pairs, g(4b), using a sample of four-jet events selected from data collected with the OPAL detector. Events with an enhanced signal of gluon splitting to b (b) over bar quarks are selected if two of the jets are close in phase-space and contain detached secondary vertices. For the event sample containing two b (b) over bar quark pairs, three of the four jets are required to have a significantly detached secondary vertex. Information from the event topology is combined in a likelihood fit to extract the values of g(b (b) over bar) and g(4b), namely g(b (b) over bar) = (3.07 +/- 0.53(stat) +/- 0.97(syst)) x 10(-3), g(4b) = (0.36 +/- 0.17(stat) +/- 0.27(syst)) x 10(-3).",

author = "G Abbiendi and Shaun Ashby and Ian Bloodworth and Paul Bright-Thomas and David Charlton and Christopher Hawkes and Roger Homer and Predrag Jovanovic and Alun Lloyd and Thomas McMahon and Stephen O'Neale and Scott Talbot and Miriam Watson and Peter Watkins and Alan Watson and Nigel Watson and John Wilson",

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Abbiendi, G, Ashby, S, Bloodworth, I, Bright-Thomas, P, Charlton, D, Hawkes, C, Homer, R, Jovanovic, P, Lloyd, A, McMahon, T, O'Neale, S, Talbot, S, Watson, M, Watkins, P, Watson, A , Watson, N & Wilson, J 2001, 'Production rates of b bbar quark pairs from gluons and b bbar b bbar events in hadronic Z° decays', European Physical Journal C, vol. 18, no. 3, pp. 447-460. https://doi.org/10.1007/s100520100580

TY - JOUR

T1 - Production rates of b bbar quark pairs from gluons and b bbar b bbar events in hadronic Z° decays

AU - Abbiendi, G

AU - Ashby, Shaun

AU - Bloodworth, Ian

AU - Bright-Thomas, Paul

AU - Charlton, David

AU - Hawkes, Christopher

AU - Homer, Roger

AU - Jovanovic, Predrag

AU - Lloyd, Alun

AU - McMahon, Thomas

AU - O'Neale, Stephen

AU - Talbot, Scott

AU - Watson, Miriam

AU - Watkins, Peter

AU - Watson, Alan

AU - Watson, Nigel

AU - Wilson, John

PY - 2001/1/1

Y1 - 2001/1/1

N2 - The rates are measured per hadronic Z(0) decay for gluon splitting to b (b) over bar quark pairs, g(b (b) over bar), and of events containing two b (b) over bar quark pairs, g(4b), using a sample of four-jet events selected from data collected with the OPAL detector. Events with an enhanced signal of gluon splitting to b (b) over bar quarks are selected if two of the jets are close in phase-space and contain detached secondary vertices. For the event sample containing two b (b) over bar quark pairs, three of the four jets are required to have a significantly detached secondary vertex. Information from the event topology is combined in a likelihood fit to extract the values of g(b (b) over bar) and g(4b), namely g(b (b) over bar) = (3.07 +/- 0.53(stat) +/- 0.97(syst)) x 10(-3), g(4b) = (0.36 +/- 0.17(stat) +/- 0.27(syst)) x 10(-3).

AB - The rates are measured per hadronic Z(0) decay for gluon splitting to b (b) over bar quark pairs, g(b (b) over bar), and of events containing two b (b) over bar quark pairs, g(4b), using a sample of four-jet events selected from data collected with the OPAL detector. Events with an enhanced signal of gluon splitting to b (b) over bar quarks are selected if two of the jets are close in phase-space and contain detached secondary vertices. For the event sample containing two b (b) over bar quark pairs, three of the four jets are required to have a significantly detached secondary vertex. Information from the event topology is combined in a likelihood fit to extract the values of g(b (b) over bar) and g(4b), namely g(b (b) over bar) = (3.07 +/- 0.53(stat) +/- 0.97(syst)) x 10(-3), g(4b) = (0.36 +/- 0.17(stat) +/- 0.27(syst)) x 10(-3).

U2 - 10.1007/s100520100580

DO - 10.1007/s100520100580

M3 - Article

SN - 1434-6044

VL - 18

SP - 447

EP - 460

JO - European Physical Journal C

JF - European Physical Journal C

IS - 3

ER -

Production rates of b bbar quark pairs from gluons and b bbar b bbar events in hadronic Z° decays

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