Abstract
We have measured gluon splitting into bottom quarks, g → bb̄, in hadronic Z0 decays collected by SLD between 1996 and 1998. The analysis was performed by looking for secondary bottom production in 4-jet events of any primary flavor. 4-jet events were identified, and in each event a topological vertex-mass technique was applied to the two jets closest in angle in order to identify them as b or b̄ jets. The upgraded CCD-based vertex detector gives very high B-tagging efficiency, especially for B hadrons with the low energies typical of this process. We measured the rate of g → bb̄ production per hadronic event, gbb̄, to be (2.44 ± 0.59(stat.) ± 0.34(syst.)) × 10-3.
| Original language | English |
|---|---|
| Pages (from-to) | 61-69 |
| Number of pages | 9 |
| Journal | Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics |
| Volume | 507 |
| Issue number | 1-4 |
| DOIs | |
| Publication status | Published - 2001 May 17 |
| Externally published | Yes |
ASJC Scopus subject areas
- Nuclear and High Energy Physics
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Improved measurement of the probability for gluon splitting into bb̄ in Z0 decays. / Abe, Koya; Abe, Kenji; Abe, T.; Adam, I.; Akimoto, H.; Aston, D.; Baird, K. G.; Baltay, C.; Band, H. R.; Barklow, T. L.; Bauer, J. M.; Bellodi, G.; Berger, R.; Blaylock, G.; Bogart, J. R.; Bower, G. R.; Brau, J. E.; Breidenbach, M.; Bugg, W. M.; Burke, D.; Burnett, T. H.; Burrows, P. N.; Calcaterra, A.; Cassell, R.; Chou, A.; Cohn, H. O.; Coller, J. A.; Convery, M. R.; Cook, V.; Cowan, R. F.; Crawford, G.; Damerell, C. J.S.; Daoudi, M.; de Groot, N.; de Sangro, R.; Dong, D. N.; Doser, M.; Dubois, R.; Erofeeva, I.; Eschenburg, V.; Etzion, E.; Fahey, S.; Falciai, D.; Fernandez, J. P.; Flood, K.; Frey, R.; Hart, E. L.; Hasuko, K.; Hertzbach, S. S.; Huffer, M. E.; Huynh, X.; Iwasaki, M.; Jackson, D. J.; Jacques, P.; Jaros, J. A.; Jiang, Z. Y.; Johnson, A. S.; Johnson, J. R.; Kajikawa, R.; Kalelkar, M.; Kang, H. J.; Kofler, R. R.; Kroeger, R. S.; Langston, M.; Leith, D. W.G.; Lia, V.; Lin, C.; Mancinelli, G.; Manly, S.; Mantovani, G.; Markiewicz, T. W.; Maruyama, T.; McKemey, A. K.; Messner, R.; Moffeit, K. C.; Moore, T. B.; Morii, M.; Muller, D.; Murzin, V.; Narita, S.; Nauenberg, U.; Neal, H.; Nesom, G.; Oishi, N.; Onoprienko, D.; Osborne, L. S.; Panvini, R. S.; Park, C. H.; Peruzzi, I.; Piccolo, M.; Piemontese, L.; Plano, R. J.; Prepost, R.; Prescott, C. Y.; Ratcliff, B. N.; Reidy, J.; Reinertsen, P. L.; Rochester, L. S.; Rowson, P. C.; Russell, J. J.; Saxton, O. H.; Schalk, T.; Schumm, B. A.; Schwiening, J.; Serbo, V. V.; Shapiro, G.; Sinev, N. B.; Snyder, J. A.; Staengle, H.; Stahl, A.; Stamer, P.; Steiner, H.; Su, D.; Suekane, F.; Sugiyama, A.; Suzuki, S.; Swartz, M.; Taylor, F. E.; Thom, J.; Torrence, E.; Usher, T.; Va'vra, J.; Verdier, R.; Wagner, D. L.; Waite, A. P.; Walston, S.; Weidemann, A. W.; Weiss, E. R.; Whitaker, J. S.; Williams, S. H.; Willocq, S.; Wilson, R. J.; Wisniewski, W. J.; Wittlin, J. L.; Woods, M.; Wright, T. R.; Yamamoto, R. K.; Yashima, J.; Yellin, S. J.; Young, C. C.; Yuta, H.
In: Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, Vol. 507, No. 1-4, 17.05.2001, p. 61-69.Research output: Contribution to journal › Article › peer-review
}
TY - JOUR
T1 - Improved measurement of the probability for gluon splitting into bb̄ in Z0 decays
AU - Abe, Koya
AU - Abe, Kenji
AU - Abe, T.
AU - Adam, I.
AU - Akimoto, H.
AU - Aston, D.
AU - Baird, K. G.
AU - Baltay, C.
AU - Band, H. R.
AU - Barklow, T. L.
AU - Bauer, J. M.
AU - Bellodi, G.
AU - Berger, R.
AU - Blaylock, G.
AU - Bogart, J. R.
AU - Bower, G. R.
AU - Brau, J. E.
AU - Breidenbach, M.
AU - Bugg, W. M.
AU - Burke, D.
AU - Burnett, T. H.
AU - Burrows, P. N.
AU - Calcaterra, A.
AU - Cassell, R.
AU - Chou, A.
AU - Cohn, H. O.
AU - Coller, J. A.
AU - Convery, M. R.
AU - Cook, V.
AU - Cowan, R. F.
AU - Crawford, G.
AU - Damerell, C. J.S.
AU - Daoudi, M.
AU - de Groot, N.
AU - de Sangro, R.
AU - Dong, D. N.
AU - Doser, M.
AU - Dubois, R.
AU - Erofeeva, I.
AU - Eschenburg, V.
AU - Etzion, E.
AU - Fahey, S.
AU - Falciai, D.
AU - Fernandez, J. P.
AU - Flood, K.
AU - Frey, R.
AU - Hart, E. L.
AU - Hasuko, K.
AU - Hertzbach, S. S.
AU - Huffer, M. E.
AU - Huynh, X.
AU - Iwasaki, M.
AU - Jackson, D. J.
AU - Jacques, P.
AU - Jaros, J. A.
AU - Jiang, Z. Y.
AU - Johnson, A. S.
AU - Johnson, J. R.
AU - Kajikawa, R.
AU - Kalelkar, M.
AU - Kang, H. J.
AU - Kofler, R. R.
AU - Kroeger, R. S.
AU - Langston, M.
AU - Leith, D. W.G.
AU - Lia, V.
AU - Lin, C.
AU - Mancinelli, G.
AU - Manly, S.
AU - Mantovani, G.
AU - Markiewicz, T. W.
AU - Maruyama, T.
AU - McKemey, A. K.
AU - Messner, R.
AU - Moffeit, K. C.
AU - Moore, T. B.
AU - Morii, M.
AU - Muller, D.
AU - Murzin, V.
AU - Narita, S.
AU - Nauenberg, U.
AU - Neal, H.
AU - Nesom, G.
AU - Oishi, N.
AU - Onoprienko, D.
AU - Osborne, L. S.
AU - Panvini, R. S.
AU - Park, C. H.
AU - Peruzzi, I.
AU - Piccolo, M.
AU - Piemontese, L.
AU - Plano, R. J.
AU - Prepost, R.
AU - Prescott, C. Y.
AU - Ratcliff, B. N.
AU - Reidy, J.
AU - Reinertsen, P. L.
AU - Rochester, L. S.
AU - Rowson, P. C.
AU - Russell, J. J.
AU - Saxton, O. H.
AU - Schalk, T.
AU - Schumm, B. A.
AU - Schwiening, J.
AU - Serbo, V. V.
AU - Shapiro, G.
AU - Sinev, N. B.
AU - Snyder, J. A.
AU - Staengle, H.
AU - Stahl, A.
AU - Stamer, P.
AU - Steiner, H.
AU - Su, D.
AU - Suekane, F.
AU - Sugiyama, A.
AU - Suzuki, S.
AU - Swartz, M.
AU - Taylor, F. E.
AU - Thom, J.
AU - Torrence, E.
AU - Usher, T.
AU - Va'vra, J.
AU - Verdier, R.
AU - Wagner, D. L.
AU - Waite, A. P.
AU - Walston, S.
AU - Weidemann, A. W.
AU - Weiss, E. R.
AU - Whitaker, J. S.
AU - Williams, S. H.
AU - Willocq, S.
AU - Wilson, R. J.
AU - Wisniewski, W. J.
AU - Wittlin, J. L.
AU - Woods, M.
AU - Wright, T. R.
AU - Yamamoto, R. K.
AU - Yashima, J.
AU - Yellin, S. J.
AU - Young, C. C.
AU - Yuta, H.
N1 - Funding Information: We thank Mike Seymour for helpful conversations. We thank the personnel of the SLAC accelerator department and the technical staffs of our collaborating institutions for their outstanding efforts on our behalf. This work was supported by the US Department of Energy and National Science Foundation, the UK Particle Physics and Astronomy Research Council, the Istituto Nazionale di Fisica Nucleare of Italy, the Japan–US Cooperative Research Project on High Energy Physics, and the Korea Research Foundation.
PY - 2001/5/17
Y1 - 2001/5/17
N2 - We have measured gluon splitting into bottom quarks, g → bb̄, in hadronic Z0 decays collected by SLD between 1996 and 1998. The analysis was performed by looking for secondary bottom production in 4-jet events of any primary flavor. 4-jet events were identified, and in each event a topological vertex-mass technique was applied to the two jets closest in angle in order to identify them as b or b̄ jets. The upgraded CCD-based vertex detector gives very high B-tagging efficiency, especially for B hadrons with the low energies typical of this process. We measured the rate of g → bb̄ production per hadronic event, gbb̄, to be (2.44 ± 0.59(stat.) ± 0.34(syst.)) × 10-3.
AB - We have measured gluon splitting into bottom quarks, g → bb̄, in hadronic Z0 decays collected by SLD between 1996 and 1998. The analysis was performed by looking for secondary bottom production in 4-jet events of any primary flavor. 4-jet events were identified, and in each event a topological vertex-mass technique was applied to the two jets closest in angle in order to identify them as b or b̄ jets. The upgraded CCD-based vertex detector gives very high B-tagging efficiency, especially for B hadrons with the low energies typical of this process. We measured the rate of g → bb̄ production per hadronic event, gbb̄, to be (2.44 ± 0.59(stat.) ± 0.34(syst.)) × 10-3.
UR - http://www.scopus.com/inward/record.url?scp=0035902167&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0035902167&partnerID=8YFLogxK
U2 - 10.1016/S0370-2693(01)00367-7
DO - 10.1016/S0370-2693(01)00367-7
M3 - Article
AN - SCOPUS:0035902167
VL - 507
SP - 61
EP - 69
JO - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
JF - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
SN - 0370-2693
IS - 1-4
ER -