Measurement of the branching ratios of the Z0 into heavy quarks

Koya Abe; Kenji Abe; T. Abe; I. Adam; H. Akimoto; D. Aston; K. G. Baird; C. Baltay; H. R. Band; T. L. Barklow; J. M. Bauer; G. Bellodi; R. Berger; G. Blaylock; J. R. Bogart; G. R. Bower; J. E. Brau; M. Breidenbach; W. M. Bugg; D. Burke; T. H. Burnett; P. N. Burrows; A. Calcaterra; R. Cassell; A. Chou; H. O. Cohn; J. A. Coller; M. R. Convery; V. Cook; R. F. Cowan; G. Crawford; C. J.S. Damerell; M. Daoudi; N. De Groot; R. De Sangro; D. N. Dong; M. Doser; R. Dubois; I. Erofeeva; V. Eschenburg; E. Etzion; S. Fahey; D. Falciai; J. P. Fernandez; K. Flood; R. Frey; E. L. Hart; K. Hasuko; S. S. Hertzbach; M. E. Huffer; X. Huynh; M. Iwasaki; D. J. Jackson; P. Jacques; J. A. Jaros; Z. Y. Jiang; A. S. Johnson; J. R. Johnson; R. Kajikawa; M. Kalelkar; H. J. Kang; R. R. Kofler; R. S. Kroeger; M. Langston; D. W.G. Leith; V. Lia; C. Lin; G. Mancinelli; S. Manly; G. Mantovani; T. W. Markiewicz; T. Maruyama; A. K. McKemey; R. Messner; K. C. Moffeit; T. B. Moore; M. Morii; D. Muller; V. Murzin; S. Narita; U. Nauenberg; H. Neal; G. Nesom; N. Oishi; D. Onoprienko; L. S. Osborne; R. S. Panvini; C. H. Park; I. Peruzzi; M. Piccolo; L. Piemontese; R. J. Plano; R. Prepost; C. Y. Prescott; B. N. Ratcliff; J. Reidy; P. L. Reinertsen; L. S. Rochester; P. C. Rowson; J. J. Russell; O. H. Saxton; T. Schalk; B. A. Schumm; J. Schwiening; V. V. Serbo; G. Shapiro; N. B. Sinev; J. A. Snyder; H. Staengle; A. Stahl; P. Stamer; H. Steiner; D. Su; F. Suekane; A. Sugiyama; A. Suzuki; M. Swartz; F. E. Taylor; J. Thom; E. Torrence; T. Usher; J. Va'vra; R. Verdier; D. L. Wagner; A. P. Waite; S. Walston; A. W. Weidemann; E. R. Weiss; J. S. Whitaker; S. H. Williams; S. Willocq; R. J. Wilson; W. J. Wisniewski; J. L. Wittlin; M. Woods; T. R. Wright; R. K. Yamamoto; J. Yashima; S. J. Yellin; C. C. Young; H. Yuta

doi:10.1103/PhysRevD.71.112004

Measurement of the branching ratios of the Z0 into heavy quarks

Koya Abe, Kenji Abe, T. Abe, I. Adam, H. Akimoto, D. Aston, K. G. Baird, C. Baltay, H. R. Band, T. L. Barklow, J. M. Bauer, G. Bellodi, R. Berger, G. Blaylock, J. R. Bogart, G. R. Bower, J. E. Brau, M. Breidenbach, W. M. Bugg, D. BurkeT. H. Burnett, P. N. Burrows, A. Calcaterra, R. Cassell, A. Chou, H. O. Cohn, J. A. Coller, M. R. Convery, V. Cook, R. F. Cowan, G. Crawford, C. J.S. Damerell, M. Daoudi, N. De Groot, R. De Sangro, D. N. Dong, M. Doser, R. Dubois, I. Erofeeva, V. Eschenburg, E. Etzion, S. Fahey, D. Falciai, J. P. Fernandez, K. Flood, R. Frey, E. L. Hart, K. Hasuko, S. S. Hertzbach, M. E. Huffer, X. Huynh, M. Iwasaki, D. J. Jackson, P. Jacques, J. A. Jaros, Z. Y. Jiang, A. S. Johnson, J. R. Johnson, R. Kajikawa, M. Kalelkar, H. J. Kang, R. R. Kofler, R. S. Kroeger, M. Langston, D. W.G. Leith, V. Lia, C. Lin, G. Mancinelli, S. Manly, G. Mantovani, T. W. Markiewicz, T. Maruyama, A. K. McKemey, R. Messner, K. C. Moffeit, T. B. Moore, M. Morii, D. Muller, V. Murzin, S. Narita, U. Nauenberg, H. Neal, G. Nesom, N. Oishi, D. Onoprienko, L. S. Osborne, R. S. Panvini, C. H. Park, I. Peruzzi, M. Piccolo, L. Piemontese, R. J. Plano, R. Prepost, C. Y. Prescott, B. N. Ratcliff, J. Reidy, P. L. Reinertsen, L. S. Rochester, P. C. Rowson, J. J. Russell, O. H. Saxton, T. Schalk, B. A. Schumm, J. Schwiening, V. V. Serbo, G. Shapiro, N. B. Sinev, J. A. Snyder, H. Staengle, A. Stahl, P. Stamer, H. Steiner, D. Su, F. Suekane, A. Sugiyama, A. Suzuki, M. Swartz, F. E. Taylor, J. Thom, E. Torrence, T. Usher, J. Va'vra, R. Verdier, D. L. Wagner, A. P. Waite, S. Walston, A. W. Weidemann, E. R. Weiss, J. S. Whitaker, S. H. Williams, S. Willocq, R. J. Wilson, W. J. Wisniewski, J. L. Wittlin, M. Woods, T. R. Wright, R. K. Yamamoto, J. Yashima, S. J. Yellin, C. C. Young, H. Yuta

Research Center for Neutrino Science (RCNS)

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

10 Citations (Scopus)

Abstract

We measure the hadronic branching ratios of the Z0 boson into heavy quarks: Rb=ΓZ0→bb̄/ΓZ0→hadrons and Rc= ΓZ0→cc̄/ΓZ0→hadrons using a multitag technique. The measurement was performed using about 400000 hadronic Z0 events recorded in the SLC Large Detector experiment at SLAC between 1996 and 1998. The small and stable SLAC Linear Collider beam spot and the CCD-based vertex detector were used to reconstruct bottom and charm hadron decay vertices with high efficiency and purity, which enables us to measure most efficiencies from data. We obtain, Rb=0.21604±0.00098(stat.)±0.00073(syst.)0.00012(Rc) and, Rc=0.1744±0.0031(stat.)±0.0020(syst.)0.0006(Rb).

Original language	English
Article number	112004
Journal	Physical Review D - Particles, Fields, Gravitation and Cosmology
Volume	71
Issue number	11
DOIs	https://doi.org/10.1103/PhysRevD.71.112004
Publication status	Published - 2005 Jun 1

ASJC Scopus subject areas

Nuclear and High Energy Physics
Physics and Astronomy (miscellaneous)

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Abe, K., Abe, K., 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., ... Yuta, H. (2005). Measurement of the branching ratios of the Z0 into heavy quarks. Physical Review D - Particles, Fields, Gravitation and Cosmology, 71(11), [112004]. https://doi.org/10.1103/PhysRevD.71.112004

Measurement of the branching ratios of the Z0 into heavy quarks. / 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, A.; 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: Physical Review D - Particles, Fields, Gravitation and Cosmology, Vol. 71, No. 11, 112004, 01.06.2005.

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

Abe, K, Abe, K, Abe, T, Adam, I, Akimoto, H, Aston, D, Baird, KG, Baltay, C, Band, HR, Barklow, TL, Bauer, JM, Bellodi, G, Berger, R, Blaylock, G, Bogart, JR, Bower, GR, Brau, JE, Breidenbach, M, Bugg, WM, Burke, D, Burnett, TH, Burrows, PN, Calcaterra, A, Cassell, R, Chou, A, Cohn, HO, Coller, JA, Convery, MR, Cook, V, Cowan, RF, Crawford, G, Damerell, CJS, Daoudi, M, De Groot, N, De Sangro, R, Dong, DN, Doser, M, Dubois, R, Erofeeva, I, Eschenburg, V, Etzion, E, Fahey, S, Falciai, D, Fernandez, JP, Flood, K, Frey, R, Hart, EL, Hasuko, K, Hertzbach, SS, Huffer, ME, Huynh, X, Iwasaki, M, Jackson, DJ, Jacques, P, Jaros, JA, Jiang, ZY, Johnson, AS, Johnson, JR, Kajikawa, R, Kalelkar, M, Kang, HJ, Kofler, RR, Kroeger, RS, Langston, M, Leith, DWG, Lia, V, Lin, C, Mancinelli, G, Manly, S, Mantovani, G, Markiewicz, TW, Maruyama, T, McKemey, AK, Messner, R, Moffeit, KC, Moore, TB, Morii, M, Muller, D, Murzin, V, Narita, S, Nauenberg, U, Neal, H, Nesom, G, Oishi, N, Onoprienko, D, Osborne, LS, Panvini, RS, Park, CH, Peruzzi, I, Piccolo, M, Piemontese, L, Plano, RJ, Prepost, R, Prescott, CY, Ratcliff, BN, Reidy, J, Reinertsen, PL, Rochester, LS, Rowson, PC, Russell, JJ, Saxton, OH, Schalk, T, Schumm, BA, Schwiening, J, Serbo, VV, Shapiro, G, Sinev, NB, Snyder, JA, Staengle, H, Stahl, A, Stamer, P, Steiner, H, Su, D, Suekane, F, Sugiyama, A, Suzuki, A, Swartz, M, Taylor, FE, Thom, J, Torrence, E, Usher, T, Va'vra, J, Verdier, R, Wagner, DL, Waite, AP, Walston, S, Weidemann, AW, Weiss, ER, Whitaker, JS, Williams, SH, Willocq, S, Wilson, RJ, Wisniewski, WJ, Wittlin, JL, Woods, M, Wright, TR, Yamamoto, RK, Yashima, J, Yellin, SJ, Young, CC & Yuta, H 2005, 'Measurement of the branching ratios of the Z0 into heavy quarks', Physical Review D - Particles, Fields, Gravitation and Cosmology, vol. 71, no. 11, 112004. https://doi.org/10.1103/PhysRevD.71.112004

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, A. ; 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. / Measurement of the branching ratios of the Z0 into heavy quarks. In: Physical Review D - Particles, Fields, Gravitation and Cosmology. 2005 ; Vol. 71, No. 11.

@article{18fea0087f0f4261b747ad49ca2c6dbe,

title = "Measurement of the branching ratios of the Z0 into heavy quarks",

abstract = "We measure the hadronic branching ratios of the Z0 boson into heavy quarks: Rb=ΓZ0→b{\=b}/ΓZ0→hadrons and Rc= ΓZ0→c{\=c}/ΓZ0→hadrons using a multitag technique. The measurement was performed using about 400000 hadronic Z0 events recorded in the SLC Large Detector experiment at SLAC between 1996 and 1998. The small and stable SLAC Linear Collider beam spot and the CCD-based vertex detector were used to reconstruct bottom and charm hadron decay vertices with high efficiency and purity, which enables us to measure most efficiencies from data. We obtain, Rb=0.21604±0.00098(stat.)±0.00073(syst.)0.00012(Rc) and, Rc=0.1744±0.0031(stat.)±0.0020(syst.)0.0006(Rb).",

author = "Koya Abe and Kenji Abe and T. Abe and I. Adam and H. Akimoto and D. Aston and Baird, {K. G.} and C. Baltay and Band, {H. R.} and Barklow, {T. L.} and Bauer, {J. M.} and G. Bellodi and R. Berger and G. Blaylock and Bogart, {J. R.} and Bower, {G. R.} and Brau, {J. E.} and M. Breidenbach and Bugg, {W. M.} and D. Burke and Burnett, {T. H.} and Burrows, {P. N.} and A. Calcaterra and R. Cassell and A. Chou and Cohn, {H. O.} and Coller, {J. A.} and Convery, {M. R.} and V. Cook and Cowan, {R. F.} and G. Crawford and Damerell, {C. J.S.} and M. Daoudi and {De Groot}, N. and {De Sangro}, R. and Dong, {D. N.} and M. Doser and R. Dubois and I. Erofeeva and V. Eschenburg and E. Etzion and S. Fahey and D. Falciai and Fernandez, {J. P.} and K. Flood and R. Frey and Hart, {E. L.} and K. Hasuko and Hertzbach, {S. S.} and Huffer, {M. E.} and X. Huynh and M. Iwasaki and Jackson, {D. J.} and P. Jacques and Jaros, {J. A.} and Jiang, {Z. Y.} and Johnson, {A. S.} and Johnson, {J. R.} and R. Kajikawa and M. Kalelkar and Kang, {H. J.} and Kofler, {R. R.} and Kroeger, {R. S.} and M. Langston and Leith, {D. W.G.} and V. Lia and C. Lin and G. Mancinelli and S. Manly and G. Mantovani and Markiewicz, {T. W.} and T. Maruyama and McKemey, {A. K.} and R. Messner and Moffeit, {K. C.} and Moore, {T. B.} and M. Morii and D. Muller and V. Murzin and S. Narita and U. Nauenberg and H. Neal and G. Nesom and N. Oishi and D. Onoprienko and Osborne, {L. S.} and Panvini, {R. S.} and Park, {C. H.} and I. Peruzzi and M. Piccolo and L. Piemontese and Plano, {R. J.} and R. Prepost and Prescott, {C. Y.} and Ratcliff, {B. N.} and J. Reidy and Reinertsen, {P. L.} and Rochester, {L. S.} and Rowson, {P. C.} and Russell, {J. J.} and Saxton, {O. H.} and T. Schalk and Schumm, {B. A.} and J. Schwiening and Serbo, {V. V.} and G. Shapiro and Sinev, {N. B.} and Snyder, {J. A.} and H. Staengle and A. Stahl and P. Stamer and H. Steiner and D. Su and F. Suekane and A. Sugiyama and A. Suzuki and M. Swartz and Taylor, {F. E.} and J. Thom and E. Torrence and T. Usher and J. Va'vra and R. Verdier and Wagner, {D. L.} and Waite, {A. P.} and S. Walston and Weidemann, {A. W.} and Weiss, {E. R.} and Whitaker, {J. S.} and Williams, {S. H.} and S. Willocq and Wilson, {R. J.} and Wisniewski, {W. J.} and Wittlin, {J. L.} and M. Woods and Wright, {T. R.} and Yamamoto, {R. K.} and J. Yashima and Yellin, {S. J.} and Young, {C. C.} and H. Yuta",

year = "2005",

month = jun,

day = "1",

doi = "10.1103/PhysRevD.71.112004",

language = "English",

volume = "71",

journal = "Physical Review D - Particles, Fields, Gravitation and Cosmology",

issn = "1550-7998",

number = "11",

}

TY - JOUR

T1 - Measurement of the branching ratios of the Z0 into heavy quarks

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, A.

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.

PY - 2005/6/1

Y1 - 2005/6/1

N2 - We measure the hadronic branching ratios of the Z0 boson into heavy quarks: Rb=ΓZ0→bb̄/ΓZ0→hadrons and Rc= ΓZ0→cc̄/ΓZ0→hadrons using a multitag technique. The measurement was performed using about 400000 hadronic Z0 events recorded in the SLC Large Detector experiment at SLAC between 1996 and 1998. The small and stable SLAC Linear Collider beam spot and the CCD-based vertex detector were used to reconstruct bottom and charm hadron decay vertices with high efficiency and purity, which enables us to measure most efficiencies from data. We obtain, Rb=0.21604±0.00098(stat.)±0.00073(syst.)0.00012(Rc) and, Rc=0.1744±0.0031(stat.)±0.0020(syst.)0.0006(Rb).

AB - We measure the hadronic branching ratios of the Z0 boson into heavy quarks: Rb=ΓZ0→bb̄/ΓZ0→hadrons and Rc= ΓZ0→cc̄/ΓZ0→hadrons using a multitag technique. The measurement was performed using about 400000 hadronic Z0 events recorded in the SLC Large Detector experiment at SLAC between 1996 and 1998. The small and stable SLAC Linear Collider beam spot and the CCD-based vertex detector were used to reconstruct bottom and charm hadron decay vertices with high efficiency and purity, which enables us to measure most efficiencies from data. We obtain, Rb=0.21604±0.00098(stat.)±0.00073(syst.)0.00012(Rc) and, Rc=0.1744±0.0031(stat.)±0.0020(syst.)0.0006(Rb).

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U2 - 10.1103/PhysRevD.71.112004

DO - 10.1103/PhysRevD.71.112004

M3 - Article

AN - SCOPUS:33644549406

VL - 71

JO - Physical Review D - Particles, Fields, Gravitation and Cosmology

JF - Physical Review D - Particles, Fields, Gravitation and Cosmology

SN - 1550-7998

IS - 11

M1 - 112004

ER -