Study of χc1 and χc2 meson production in B meson decays

S. Chen; J. Fast; J. W. Hinson; J. Lee; D. H. Miller; E. I. Shibata; I. P.J. Shipsey; V. Pavlunin; D. Cronin-Hennessy; A. L. Lyon; E. H. Thorndike; V. Savinov; T. E. Coan; V. Fadeyev; Y. S. Gao; Y. Maravin; I. Narsky; R. Stroynowski; J. Ye; T. Wlodek; M. Artuso; R. Ayad; C. Boulahouache; K. Bukin; E. Dambasuren; S. Karamov; G. Majumder; G. C. Moneti; R. Mountain; S. Schuh; T. Skwarnicki; S. Stone; J. C. Wang; A. Wolf; J. Wu; S. Kopp; M. Kostin; A. H. Mahmood; S. E. Csorna; I. Danko; K. W. McLean; Z. Xu; R. Godang; G. Bonvicini; D. Cinabro; M. Dubrovin; S. McGee; G. J. Zhou; E. Lipeles; S. P. Pappas; M. Schmidtler; A. Shapiro; W. M. Sun; A. J. Weinstein; F. Würthwein; D. E. Jaffe; G. Masek; H. P. Paar; E. M. Potter; S. Prell; D. M. Asner; A. Eppich; T. S. Hill; R. J. Morrison; R. A. Briere; G. P. Chen; A. Gritsan; J. P. Alexander; R. Baker; C. Bebek; B. E. Berger; K. Berkelman; F. Blanc; V. Boisvert; D. G. Cassel; P. S. Drell; J. E. Duboscq; K. M. Ecklund; R. Ehrlich; A. D. Foland; P. Gaidarev; L. Gibbons; B. Gittelman; S. W. Gray; D. L. Hartill; B. K. Heltsley; P. I. Hopman; L. Hsu; C. D. Jones; J. Kandaswamy; D. L. Kreinick; M. Lohner; A. Magerkurth; T. O. Meyer; N. B. Mistry; E. Nordberg; M. Palmer; J. R. Patterson; D. Peterson; D. Riley; A. Romano; J. G. Thayer; D. Urner; B. Valant-Spaight; G. Viehhauser; A. Warburton; P. Avery; C. Prescott; A. I. Rubiera; H. Stoeck; J. Yelton; G. Brandenburg; A. Ershov; D. Y.J. Kim; R. Wilson; H. Yamamoto; T. Bergfeld; B. I. Eisenstein; J. Ernst; G. E. Gladding; G. D. Gollin; R. M. Hans; E. Johnson; I. Karliner; M. A. Marsh; C. Plager; C. Sedlack; M. Selen; J. J. Thaler; J. Williams; K. W. Edwards; R. Janicek; P. M. Patel; A. J. Sadoff; R. Ammar; A. Bean; D. Besson; X. Zhao; S. Anderson; V. V. Frolov; Y. Kubota; S. J. Lee; R. Mahapatra; J. J. O’Neill; R. Poling; T. Riehle; A. Smith; C. J. Stepaniak; J. Urheim; S. Ahmed; M. S. Alam; S. B. Athar; L. Jian; L. Ling; M. Saleem; S. Timm; F. Wappler; A. Anastassov; E. Eckhart; K. K. Gan; C. Gwon; T. Hart; K. Honscheid; D. Hufnagel; H. Kagan; R. Kass; T. K. Pedlar; H. Schwarthoff; J. B. Thayer; E. von Toerne; M. M. Zoeller; S. J. Richichi; H. Severini; P. Skubic; A. Undrus

doi:10.1103/PhysRevD.63.031102

Study of χ_c1 and χ_c2 meson production in B meson decays

S. Chen, J. Fast, J. W. Hinson, J. Lee, D. H. Miller, E. I. Shibata, I. P.J. Shipsey, V. Pavlunin, D. Cronin-Hennessy, A. L. Lyon, E. H. Thorndike, V. Savinov, T. E. Coan, V. Fadeyev, Y. S. Gao, Y. Maravin, I. Narsky, R. Stroynowski, J. Ye, T. WlodekM. Artuso, R. Ayad, C. Boulahouache, K. Bukin, E. Dambasuren, S. Karamov, G. Majumder, G. C. Moneti, R. Mountain, S. Schuh, T. Skwarnicki, S. Stone, J. C. Wang, A. Wolf, J. Wu, S. Kopp, M. Kostin, A. H. Mahmood, S. E. Csorna, I. Danko, K. W. McLean, Z. Xu, R. Godang, G. Bonvicini, D. Cinabro, M. Dubrovin, S. McGee, G. J. Zhou, E. Lipeles, S. P. Pappas, M. Schmidtler, A. Shapiro, W. M. Sun, A. J. Weinstein, F. Würthwein, D. E. Jaffe, G. Masek, H. P. Paar, E. M. Potter, S. Prell, D. M. Asner, A. Eppich, T. S. Hill, R. J. Morrison, R. A. Briere, G. P. Chen, A. Gritsan, J. P. Alexander, R. Baker, C. Bebek, B. E. Berger, K. Berkelman, F. Blanc, V. Boisvert, D. G. Cassel, P. S. Drell, J. E. Duboscq, K. M. Ecklund, R. Ehrlich, A. D. Foland, P. Gaidarev, L. Gibbons, B. Gittelman, S. W. Gray, D. L. Hartill, B. K. Heltsley, P. I. Hopman, L. Hsu, C. D. Jones, J. Kandaswamy, D. L. Kreinick, M. Lohner, A. Magerkurth, T. O. Meyer, N. B. Mistry, E. Nordberg, M. Palmer, J. R. Patterson, D. Peterson, D. Riley, A. Romano, J. G. Thayer, D. Urner, B. Valant-Spaight, G. Viehhauser, A. Warburton, P. Avery, C. Prescott, A. I. Rubiera, H. Stoeck, J. Yelton, G. Brandenburg, A. Ershov, D. Y.J. Kim, R. Wilson, H. Yamamoto, T. Bergfeld, B. I. Eisenstein, J. Ernst, G. E. Gladding, G. D. Gollin, R. M. Hans, E. Johnson, I. Karliner, M. A. Marsh, C. Plager, C. Sedlack, M. Selen, J. J. Thaler, J. Williams, K. W. Edwards, R. Janicek, P. M. Patel, A. J. Sadoff, R. Ammar, A. Bean, D. Besson, X. Zhao, S. Anderson, V. V. Frolov, Y. Kubota, S. J. Lee, R. Mahapatra, J. J. O’Neill, R. Poling, T. Riehle, A. Smith, C. J. Stepaniak, J. Urheim, S. Ahmed, M. S. Alam, S. B. Athar, L. Jian, L. Ling, M. Saleem, S. Timm, F. Wappler, A. Anastassov, E. Eckhart, K. K. Gan, C. Gwon, T. Hart, K. Honscheid, D. Hufnagel, H. Kagan, R. Kass, T. K. Pedlar, H. Schwarthoff, J. B. Thayer, E. von Toerne, M. M. Zoeller, S. J. Richichi, H. Severini, P. Skubic, A. Undrus

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

12 Scopus citations

Abstract

Using a sample of 9.7×10⁶ BB̄ meson pairs collected with the CLEO detector, we study B decays to the χ_c1 and X_c2 charmonia states, which are reconstructed via their radiative decays to J/ψ. We first measure the branching fraction for inclusive χ_c1 production in B decays to be B(B→χ_c1X) = (4.14±0.31±0.40)× 10^-3, where the first uncertainty is statistical and the second one is systematic. We derive the branching fractions for direct χ_c1 and χ_c2 production in B decays by subtracting the known contribution of the decay chain B →ψ(2S)X with ψ(2S)→χ_{c1, 2}γ. We obtain B[B→χ_c1(direct)x] = (3.83±0.31±0.40)× 10^-3. No statistically significant signal for χ_c2 production is observed in either case. Using the Feldman-Cousins approach, we determine the 95% confidence intervals to be [0.2, 2.0] × 10^-3 for B(B→χ_c2X), [0.0, 1.7]× 10^-3 for B[B →χ_c2(direct)X], and [0.00, 0.44] for the ratio Γ[B→χ_c2(direct)X]/Γ[B→χ _c1(direct)X]. We also measure the branching ratio Γ[B→χ_c2(direct)X _s]/Γ[B→χ_c1(direct)X_s] for different X_s configurations by reconstructing B decays into exclusive final states with J/ψ, γ, a kaon, and up to four pions. For all the X_s configurations, we observe a strong χ_c1 signal yet no statistically significant χ_c2 signal. We discuss how our results compare with theoretical predictions in different models of charmonium production.

Original language	English (US)
Article number	031102
Number of pages	1
Journal	Physical Review D
Volume	63
Issue number	3
DOIs	https://doi.org/10.1103/PhysRevD.63.031102
State	Published - Jan 1 2001
Externally published	Yes

ASJC Scopus subject areas

Nuclear and High Energy Physics
Physics and Astronomy (miscellaneous)

Access to Document

10.1103/PhysRevD.63.031102

Cite this

Chen, S., Fast, J., Hinson, J. W., Lee, J., Miller, D. H., Shibata, E. I., Shipsey, I. P. J., Pavlunin, V., Cronin-Hennessy, D., Lyon, A. L., Thorndike, E. H., Savinov, V., Coan, T. E., Fadeyev, V., Gao, Y. S., Maravin, Y., Narsky, I., Stroynowski, R., Ye, J., ... Undrus, A. (2001). Study of χ_c1 and χ_c2 meson production in B meson decays. Physical Review D, 63(3), Article 031102. https://doi.org/10.1103/PhysRevD.63.031102

Chen, S, Fast, J, Hinson, JW, Lee, J, Miller, DH, Shibata, EI, Shipsey, IPJ, Pavlunin, V, Cronin-Hennessy, D, Lyon, AL, Thorndike, EH, Savinov, V, Coan, TE, Fadeyev, V, Gao, YS, Maravin, Y, Narsky, I, Stroynowski, R, Ye, J, Wlodek, T, Artuso, M, Ayad, R, Boulahouache, C, Bukin, K, Dambasuren, E, Karamov, S, Majumder, G, Moneti, GC, Mountain, R, Schuh, S, Skwarnicki, T, Stone, S, Wang, JC, Wolf, A, Wu, J, Kopp, S, Kostin, M, Mahmood, AH, Csorna, SE, Danko, I, McLean, KW, Xu, Z, Godang, R, Bonvicini, G, Cinabro, D, Dubrovin, M, McGee, S, Zhou, GJ, Lipeles, E, Pappas, SP, Schmidtler, M, Shapiro, A, Sun, WM, Weinstein, AJ, Würthwein, F, Jaffe, DE, Masek, G, Paar, HP, Potter, EM, Prell, S, Asner, DM, Eppich, A, Hill, TS, Morrison, RJ, Briere, RA, Chen, GP, Gritsan, A, Alexander, JP, Baker, R, Bebek, C, Berger, BE, Berkelman, K, Blanc, F, Boisvert, V, Cassel, DG, Drell, PS, Duboscq, JE, Ecklund, KM, Ehrlich, R, Foland, AD, Gaidarev, P, Gibbons, L, Gittelman, B, Gray, SW, Hartill, DL, Heltsley, BK, Hopman, PI, Hsu, L, Jones, CD, Kandaswamy, J, Kreinick, DL, Lohner, M, Magerkurth, A, Meyer, TO, Mistry, NB, Nordberg, E, Palmer, M, Patterson, JR, Peterson, D, Riley, D, Romano, A, Thayer, JG, Urner, D, Valant-Spaight, B, Viehhauser, G, Warburton, A, Avery, P, Prescott, C, Rubiera, AI, Stoeck, H, Yelton, J, Brandenburg, G, Ershov, A, Kim, DYJ, Wilson, R, Yamamoto, H, Bergfeld, T, Eisenstein, BI, Ernst, J, Gladding, GE, Gollin, GD, Hans, RM, Johnson, E, Karliner, I, Marsh, MA, Plager, C, Sedlack, C, Selen, M, Thaler, JJ, Williams, J, Edwards, KW, Janicek, R, Patel, PM, Sadoff, AJ, Ammar, R, Bean, A, Besson, D, Zhao, X, Anderson, S, Frolov, VV, Kubota, Y, Lee, SJ, Mahapatra, R, O’Neill, JJ, Poling, R, Riehle, T, Smith, A, Stepaniak, CJ, Urheim, J, Ahmed, S, Alam, MS, Athar, SB, Jian, L, Ling, L, Saleem, M, Timm, S, Wappler, F, Anastassov, A, Eckhart, E, Gan, KK, Gwon, C, Hart, T, Honscheid, K, Hufnagel, D, Kagan, H, Kass, R, Pedlar, TK, Schwarthoff, H, Thayer, JB, von Toerne, E, Zoeller, MM, Richichi, SJ, Severini, H, Skubic, P & Undrus, A 2001, 'Study of χ_c1 and χ_c2 meson production in B meson decays', Physical Review D, vol. 63, no. 3, 031102. https://doi.org/10.1103/PhysRevD.63.031102

@article{ffa7e9d2838845b9b769e2445259628a,

title = "Study of χc1 and χc2 meson production in B meson decays",

abstract = "Using a sample of 9.7×106 B{\=B} meson pairs collected with the CLEO detector, we study B decays to the χc1 and Xc2 charmonia states, which are reconstructed via their radiative decays to J/ψ. We first measure the branching fraction for inclusive χc1 production in B decays to be B(B→χc1X) = (4.14±0.31±0.40)× 10-3, where the first uncertainty is statistical and the second one is systematic. We derive the branching fractions for direct χc1 and χc2 production in B decays by subtracting the known contribution of the decay chain B →ψ(2S)X with ψ(2S)→χc1, 2γ. We obtain B[B→χc1(direct)x] = (3.83±0.31±0.40)× 10-3. No statistically significant signal for χc2 production is observed in either case. Using the Feldman-Cousins approach, we determine the 95% confidence intervals to be [0.2, 2.0] × 10-3 for B(B→χc2X), [0.0, 1.7]× 10-3 for B[B →χc2(direct)X], and [0.00, 0.44] for the ratio Γ[B→χc2(direct)X]/Γ[B→χ c1(direct)X]. We also measure the branching ratio Γ[B→χc2(direct)X s]/Γ[B→χc1(direct)Xs] for different Xs configurations by reconstructing B decays into exclusive final states with J/ψ, γ, a kaon, and up to four pions. For all the Xs configurations, we observe a strong χc1 signal yet no statistically significant χc2 signal. We discuss how our results compare with theoretical predictions in different models of charmonium production.",

author = "S. Chen and J. Fast and Hinson, {J. W.} and J. Lee and Miller, {D. H.} and Shibata, {E. I.} and Shipsey, {I. P.J.} and V. Pavlunin and D. Cronin-Hennessy and Lyon, {A. L.} and Thorndike, {E. H.} and V. Savinov and Coan, {T. E.} and V. Fadeyev and Gao, {Y. S.} and Y. Maravin and I. Narsky and R. Stroynowski and J. Ye and T. Wlodek and M. Artuso and R. Ayad and C. Boulahouache and K. Bukin and E. Dambasuren and S. Karamov and G. Majumder and Moneti, {G. C.} and R. Mountain and S. Schuh and T. Skwarnicki and S. Stone and Wang, {J. C.} and A. Wolf and J. Wu and S. Kopp and M. Kostin and Mahmood, {A. H.} and Csorna, {S. E.} and I. Danko and McLean, {K. W.} and Z. Xu and R. Godang and G. Bonvicini and D. Cinabro and M. Dubrovin and S. McGee and Zhou, {G. J.} and E. Lipeles and Pappas, {S. P.} and M. Schmidtler and A. Shapiro and Sun, {W. M.} and Weinstein, {A. J.} and F. W{\"u}rthwein and Jaffe, {D. E.} and G. Masek and Paar, {H. P.} and Potter, {E. M.} and S. Prell and Asner, {D. M.} and A. Eppich and Hill, {T. S.} and Morrison, {R. J.} and Briere, {R. A.} and Chen, {G. P.} and A. Gritsan and Alexander, {J. P.} and R. Baker and C. Bebek and Berger, {B. E.} and K. Berkelman and F. Blanc and V. Boisvert and Cassel, {D. G.} and Drell, {P. S.} and Duboscq, {J. E.} and Ecklund, {K. M.} and R. Ehrlich and Foland, {A. D.} and P. Gaidarev and L. Gibbons and B. Gittelman and Gray, {S. W.} and Hartill, {D. L.} and Heltsley, {B. K.} and Hopman, {P. I.} and L. Hsu and Jones, {C. D.} and J. Kandaswamy and Kreinick, {D. L.} and M. Lohner and A. Magerkurth and Meyer, {T. O.} and Mistry, {N. B.} and E. Nordberg and M. Palmer and Patterson, {J. R.} and D. Peterson and D. Riley and A. Romano and Thayer, {J. G.} and D. Urner and B. Valant-Spaight and G. Viehhauser and A. Warburton and P. Avery and C. Prescott and Rubiera, {A. I.} and H. Stoeck and J. Yelton and G. Brandenburg and A. Ershov and Kim, {D. Y.J.} and R. Wilson and H. Yamamoto and T. Bergfeld and Eisenstein, {B. I.} and J. Ernst and Gladding, {G. E.} and Gollin, {G. D.} and Hans, {R. M.} and E. Johnson and I. Karliner and Marsh, {M. A.} and C. Plager and C. Sedlack and M. Selen and Thaler, {J. J.} and J. Williams and Edwards, {K. W.} and R. Janicek and Patel, {P. M.} and Sadoff, {A. J.} and R. Ammar and A. Bean and D. Besson and X. Zhao and S. Anderson and Frolov, {V. V.} and Y. Kubota and Lee, {S. J.} and R. Mahapatra and O{\textquoteright}Neill, {J. J.} and R. Poling and T. Riehle and A. Smith and Stepaniak, {C. J.} and J. Urheim and S. Ahmed and Alam, {M. S.} and Athar, {S. B.} and L. Jian and L. Ling and M. Saleem and S. Timm and F. Wappler and A. Anastassov and E. Eckhart and Gan, {K. K.} and C. Gwon and T. Hart and K. Honscheid and D. Hufnagel and H. Kagan and R. Kass and Pedlar, {T. K.} and H. Schwarthoff and Thayer, {J. B.} and {von Toerne}, E. and Zoeller, {M. M.} and Richichi, {S. J.} and H. Severini and P. Skubic and A. Undrus",

year = "2001",

month = jan,

day = "1",

doi = "10.1103/PhysRevD.63.031102",

language = "English (US)",

volume = "63",

journal = "Physical Review D",

issn = "0556-2821",

publisher = "American Institute of Physics",

number = "3",

}

TY - JOUR

T1 - Study of χc1 and χc2 meson production in B meson decays

AU - Chen, S.

AU - Fast, J.

AU - Hinson, J. W.

AU - Lee, J.

AU - Miller, D. H.

AU - Shibata, E. I.

AU - Shipsey, I. P.J.

AU - Pavlunin, V.

AU - Cronin-Hennessy, D.

AU - Lyon, A. L.

AU - Thorndike, E. H.

AU - Savinov, V.

AU - Coan, T. E.

AU - Fadeyev, V.

AU - Gao, Y. S.

AU - Maravin, Y.

AU - Narsky, I.

AU - Stroynowski, R.

AU - Ye, J.

AU - Wlodek, T.

AU - Artuso, M.

AU - Ayad, R.

AU - Boulahouache, C.

AU - Bukin, K.

AU - Dambasuren, E.

AU - Karamov, S.

AU - Majumder, G.

AU - Moneti, G. C.

AU - Mountain, R.

AU - Schuh, S.

AU - Skwarnicki, T.

AU - Stone, S.

AU - Wang, J. C.

AU - Wolf, A.

AU - Wu, J.

AU - Kopp, S.

AU - Kostin, M.

AU - Mahmood, A. H.

AU - Csorna, S. E.

AU - Danko, I.

AU - McLean, K. W.

AU - Xu, Z.

AU - Godang, R.

AU - Bonvicini, G.

AU - Cinabro, D.

AU - Dubrovin, M.

AU - McGee, S.

AU - Zhou, G. J.

AU - Lipeles, E.

AU - Pappas, S. P.

AU - Schmidtler, M.

AU - Shapiro, A.

AU - Sun, W. M.

AU - Weinstein, A. J.

AU - Würthwein, F.

AU - Jaffe, D. E.

AU - Masek, G.

AU - Paar, H. P.

AU - Potter, E. M.

AU - Prell, S.

AU - Asner, D. M.

AU - Eppich, A.

AU - Hill, T. S.

AU - Morrison, R. J.

AU - Briere, R. A.

AU - Chen, G. P.

AU - Gritsan, A.

AU - Alexander, J. P.

AU - Baker, R.

AU - Bebek, C.

AU - Berger, B. E.

AU - Berkelman, K.

AU - Blanc, F.

AU - Boisvert, V.

AU - Cassel, D. G.

AU - Drell, P. S.

AU - Duboscq, J. E.

AU - Ecklund, K. M.

AU - Ehrlich, R.

AU - Foland, A. D.

AU - Gaidarev, P.

AU - Gibbons, L.

AU - Gittelman, B.

AU - Gray, S. W.

AU - Hartill, D. L.

AU - Heltsley, B. K.

AU - Hopman, P. I.

AU - Hsu, L.

AU - Jones, C. D.

AU - Kandaswamy, J.

AU - Kreinick, D. L.

AU - Lohner, M.

AU - Magerkurth, A.

AU - Meyer, T. O.

AU - Mistry, N. B.

AU - Nordberg, E.

AU - Palmer, M.

AU - Patterson, J. R.

AU - Peterson, D.

AU - Riley, D.

AU - Romano, A.

AU - Thayer, J. G.

AU - Urner, D.

AU - Valant-Spaight, B.

AU - Viehhauser, G.

AU - Warburton, A.

AU - Avery, P.

AU - Prescott, C.

AU - Rubiera, A. I.

AU - Stoeck, H.

AU - Yelton, J.

AU - Brandenburg, G.

AU - Ershov, A.

AU - Kim, D. Y.J.

AU - Wilson, R.

AU - Yamamoto, H.

AU - Bergfeld, T.

AU - Eisenstein, B. I.

AU - Ernst, J.

AU - Gladding, G. E.

AU - Gollin, G. D.

AU - Hans, R. M.

AU - Johnson, E.

AU - Karliner, I.

AU - Marsh, M. A.

AU - Plager, C.

AU - Sedlack, C.

AU - Selen, M.

AU - Thaler, J. J.

AU - Williams, J.

AU - Edwards, K. W.

AU - Janicek, R.

AU - Patel, P. M.

AU - Sadoff, A. J.

AU - Ammar, R.

AU - Bean, A.

AU - Besson, D.

AU - Zhao, X.

AU - Anderson, S.

AU - Frolov, V. V.

AU - Kubota, Y.

AU - Lee, S. J.

AU - Mahapatra, R.

AU - O’Neill, J. J.

AU - Poling, R.

AU - Riehle, T.

AU - Smith, A.

AU - Stepaniak, C. J.

AU - Urheim, J.

AU - Ahmed, S.

AU - Alam, M. S.

AU - Athar, S. B.

AU - Jian, L.

AU - Ling, L.

AU - Saleem, M.

AU - Timm, S.

AU - Wappler, F.

AU - Anastassov, A.

AU - Eckhart, E.

AU - Gan, K. K.

AU - Gwon, C.

AU - Hart, T.

AU - Honscheid, K.

AU - Hufnagel, D.

AU - Kagan, H.

AU - Kass, R.

AU - Pedlar, T. K.

AU - Schwarthoff, H.

AU - Thayer, J. B.

AU - von Toerne, E.

AU - Zoeller, M. M.

AU - Richichi, S. J.

AU - Severini, H.

AU - Skubic, P.

AU - Undrus, A.

PY - 2001/1/1

Y1 - 2001/1/1

N2 - Using a sample of 9.7×106 BB̄ meson pairs collected with the CLEO detector, we study B decays to the χc1 and Xc2 charmonia states, which are reconstructed via their radiative decays to J/ψ. We first measure the branching fraction for inclusive χc1 production in B decays to be B(B→χc1X) = (4.14±0.31±0.40)× 10-3, where the first uncertainty is statistical and the second one is systematic. We derive the branching fractions for direct χc1 and χc2 production in B decays by subtracting the known contribution of the decay chain B →ψ(2S)X with ψ(2S)→χc1, 2γ. We obtain B[B→χc1(direct)x] = (3.83±0.31±0.40)× 10-3. No statistically significant signal for χc2 production is observed in either case. Using the Feldman-Cousins approach, we determine the 95% confidence intervals to be [0.2, 2.0] × 10-3 for B(B→χc2X), [0.0, 1.7]× 10-3 for B[B →χc2(direct)X], and [0.00, 0.44] for the ratio Γ[B→χc2(direct)X]/Γ[B→χ c1(direct)X]. We also measure the branching ratio Γ[B→χc2(direct)X s]/Γ[B→χc1(direct)Xs] for different Xs configurations by reconstructing B decays into exclusive final states with J/ψ, γ, a kaon, and up to four pions. For all the Xs configurations, we observe a strong χc1 signal yet no statistically significant χc2 signal. We discuss how our results compare with theoretical predictions in different models of charmonium production.

AB - Using a sample of 9.7×106 BB̄ meson pairs collected with the CLEO detector, we study B decays to the χc1 and Xc2 charmonia states, which are reconstructed via their radiative decays to J/ψ. We first measure the branching fraction for inclusive χc1 production in B decays to be B(B→χc1X) = (4.14±0.31±0.40)× 10-3, where the first uncertainty is statistical and the second one is systematic. We derive the branching fractions for direct χc1 and χc2 production in B decays by subtracting the known contribution of the decay chain B →ψ(2S)X with ψ(2S)→χc1, 2γ. We obtain B[B→χc1(direct)x] = (3.83±0.31±0.40)× 10-3. No statistically significant signal for χc2 production is observed in either case. Using the Feldman-Cousins approach, we determine the 95% confidence intervals to be [0.2, 2.0] × 10-3 for B(B→χc2X), [0.0, 1.7]× 10-3 for B[B →χc2(direct)X], and [0.00, 0.44] for the ratio Γ[B→χc2(direct)X]/Γ[B→χ c1(direct)X]. We also measure the branching ratio Γ[B→χc2(direct)X s]/Γ[B→χc1(direct)Xs] for different Xs configurations by reconstructing B decays into exclusive final states with J/ψ, γ, a kaon, and up to four pions. For all the Xs configurations, we observe a strong χc1 signal yet no statistically significant χc2 signal. We discuss how our results compare with theoretical predictions in different models of charmonium production.

UR - http://www.scopus.com/inward/record.url?scp=85037894235&partnerID=8YFLogxK

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U2 - 10.1103/PhysRevD.63.031102

DO - 10.1103/PhysRevD.63.031102

M3 - Article

AN - SCOPUS:4243313478

SN - 0556-2821

VL - 63

JO - Physical Review D

JF - Physical Review D

IS - 3

M1 - 031102

ER -

Study of χ_c1 and χ_c2 meson production in B meson decays

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