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6 results on '"Lan HB"'

1. Direct measurement of B(Ds+→φX+)

Author

Bai, JZ, Bardon, O, Blum, I, Breakstone, A, Burnett, T, Chen, GP, Chen, HF, Chen, J, Chen, SJ, Chen, SM, Chen, Y, Chen, YB, Chen, YQ, Cheng, BS, Cowan, RF, Cui, XZ, Ding, HL, Du, ZZ, Dunwoodie, W, Fan, XL, Fang, J, Gao, CS, Gao, ML, Gao, SQ, Gratton, P, Gu, JH, Gu, SD, Gu, WX, Gu, YF, Guo, YN, Han, SW, Han, Y, Harris, FA, He, J, He, M, Hitlin, DG, Hu, GY, Hu, T, Hu, XQ, Huang, DQ, Huang, YZ, Izen, JM, Jiang, CH, Jin, S, Jin, Y, Jones, L, Kang, SH, Ke, ZJ, Kelsey, MH, Kim, BK, Kong, D, Lai, YF, Lan, HB, Lang, PF, Lankford, A, Li, F, Li, J, Li, PQ, Li, Q, Li, RB, Li, W, Li, WD, Li, WG, Li, XH, Li, XN, Lin, SZ, Liu, HM, Liu, J, Liu, JH, Liu, Q, Liu, RG, Liu, Y, Liu, ZA, Lou, XC, Lowery, B, Lu, JG, Lu, JY, Luo, S, Luo, Y, M., A, C., E, M., J, Malchow, R, Mandelkern, M, Mao, HS, Mao, ZP, Meng, XC, Ni, HL, Nie, J, Olsen, SL, Oyang, J, Paluselli, D, Pan, LJ, Panetta, J, Porter, F, Prabhakar, E, Qi, ND, Que, YK, Rong, G, and Schernau, M

Subjects
Intellectual and Developmental Disabilities (IDD), Brain Disorders, Down Syndrome, Astronomical and Space Sciences, Atomic, Molecular, Nuclear, Particle and Plasma Physics, Quantum Physics, Nuclear & Particles Physics
Abstract

The absolute inclusive branching fraction of (Formula presented) has been measured from data collected by the BES detector at a center-of-mass energy of 4.03 GeV, corresponding to an integrated luminosity of 22.3 pb(Formula presented). At this energy, direct pair production (Formula presented) has been observed. We have selected (Formula presented) candidate events by reconstructing five hadronic decay modes (Formula presented), (Formula presented), (Formula presented), (Formula presented) and (Formula presented) and have searched for inclusive (Formula presented)’s in the recoiling (Formula presented). We observed three recoiling (Formula presented)’s in the 166.4 (Formula presented) 31.8 (Formula presented) candidate events, which leads to the absolute branching fraction (Formula presented) and (Formula presented). © 1998 The American Physical Society.

Published
1998

2. Direct measurement of [Formula presented]

Author

Bai, JZ, Bardon, O, Blum, I, Breakstone, A, Burnett, T, Chen, GP, Chen, HF, Chen, J, Chen, SJ, Chen, SM, Chen, Y, Chen, YB, Chen, YQ, Cheng, BS, Cowan, RF, Cui, XZ, Ding, HL, Du, ZZ, Dunwoodie, W, Fan, XL, Fang, J, Gao, CS, Gao, ML, Gao, SQ, Gratton, P, Gu, JH, Gu, SD, Gu, WX, Gu, YF, Guo, YN, Han, SW, Han, Y, Harris, FA, He, J, He, M, Hitlin, DG, Hu, GY, Hu, T, Hu, XQ, Huang, DQ, Huang, YZ, Izen, JM, Jiang, CH, Jin, S, Jin, Y, Jones, L, Kang, SH, Ke, ZJ, Kelsey, MH, Kim, BK, Kong, D, Lai, YF, Lan, HB, Lang, PF, Lankford, A, Li, F, Li, J, Li, PQ, Li, Q, Li, RB, Li, W, Li, WD, Li, WG, Li, XH, Li, XN, Lin, SZ, Liu, HM, Liu, J, Liu, JH, Liu, Q, Liu, RG, Liu, Y, Liu, ZA, Lou, XC, Lowery, B, Lu, JG, Lu, JY, Luo, S, Luo, Y, Ma, AM, Ma, EC, Ma, JM, Malchow, R, Mandelkern, M, Mao, HS, Mao, ZP, Meng, XC, Ni, HL, Nie, J, Olsen, SL, Oyang, J, Paluselli, D, Pan, LJ, Panetta, J, Porter, F, Prabhakar, E, Qi, ND, Que, YK, Rong, G, and Schernau, M

Subjects
Down Syndrome, Brain Disorders, Intellectual and Developmental Disabilities (IDD), Intellectual and Developmental Disabilities, Nuclear & Particles Physics, Astronomical and Space Sciences, Atomic, Molecular, Nuclear, Particle and Plasma Physics, Quantum Physics, Atomic, Molecular, Nuclear, Particle and Plasma Physics
Abstract

The absolute inclusive branching fraction of (Formula presented) has been measured from data collected by the BES detector at a center-of-mass energy of 4.03 GeV, corresponding to an integrated luminosity of 22.3 pb(Formula presented). At this energy, direct pair production (Formula presented) has been observed. We have selected (Formula presented) candidate events by reconstructing five hadronic decay modes (Formula presented), (Formula presented), (Formula presented), (Formula presented) and (Formula presented) and have searched for inclusive (Formula presented)’s in the recoiling (Formula presented). We observed three recoiling (Formula presented)’s in the 166.4 (Formula presented) 31.8 (Formula presented) candidate events, which leads to the absolute branching fraction (Formula presented) and (Formula presented). © 1998 The American Physical Society.

Published
1998

3. Measurement of the branching fraction of Ds inclusive semileptonic decay Ds+→e+X

Author

Bai, JZ, Bardon, O, Bian, JG, Blum, I, Breakstone, A, Burnett, T, Chai, ZW, Chen, GP, Chen, HF, Chen, J, Chen, JC, Chen, SM, Chen, Y, Chen, YB, Chen, YQ, Cheng, BS, Cowan, RF, Cui, XZ, Ding, HL, Du, ZZ, Dunwoodie, W, Fan, XL, Fang, J, Fero, M, Gao, CS, Gao, ML, Gao, SQ, Gratton, P, Gu, JH, Gu, SD, Gu, WX, Gu, YF, Guo, YN, Han, SW, Han, Y, Harris, FA, He, J, He, JT, He, M, Hitlin, DG, Hu, GY, Hu, JL, Hu, QH, Hu, T, Hu, XQ, Huang, XP, Huang, YZ, Izen, JM, Jia, QP, Jiang, CH, Jin, S, Jin, Y, Jones, L, Kang, SH, Ke, ZJ, Kelsey, MH, Kim, BK, Kong, D, Lai, YF, Lan, HB, Lang, PF, Lankford, A, Li, J, Li, PQ, Li, Q, Li, RB, Li, W, Li, WD, Li, WG, Li, XH, Li, XN, Lin, SZ, Lu, F, Liu, HM, Liu, J, Liu, JH, Liu, Q, Liu, RG, Liu, Y, Liu, ZA, Lou, XC, Lowery, B, Lu, JG, Lu, JY, Luo, SQ, Luo, Y, M., A, C., E, M., J, Mao, HS, Mao, ZP, Malchow, R, Mandelkern, M, Meng, XC, Ni, HL, Nie, J, Olsen, SL, Oyang, J, Paluselli, D, and Pan, LJ

Subjects
Down Syndrome, Brain Disorders, Intellectual and Developmental Disabilities (IDD), Astronomical and Space Sciences, Atomic, Molecular, Nuclear, Particle and Plasma Physics, Quantum Physics, Nuclear & Particles Physics
Abstract

The absolute inclusive semileptonic branching fraction of the [Formula presented] meson has been measured based on [Formula presented] of [Formula presented] collision data collected with the Beijing Spectrometer at [Formula presented] At this energy, the [Formula presented] are produced in pairs: [Formula presented] We reconstructed [Formula presented] [Formula presented] events in five hadronic decay modes. In the recoil system of these events, several [Formula presented] inclusive semileptonic decays were observed and the branching fraction is estimated to be [Formula presented] © 1997 The American Physical Society.

Published
1997

4. Measurement of the branching fraction of [Formula presented] inclusive semileptonic decay [Formula presented]

Author

Bai, JZ, Bardon, O, Bian, JG, Blum, I, Breakstone, A, Burnett, T, Chai, ZW, Chen, GP, Chen, HF, Chen, J, Chen, JC, Chen, SM, Chen, Y, Chen, YB, Chen, YQ, Cheng, BS, Cowan, RF, Cui, XZ, Ding, HL, Du, ZZ, Dunwoodie, W, Fan, XL, Fang, J, Fero, M, Gao, CS, Gao, ML, Gao, SQ, Gratton, P, Gu, JH, Gu, SD, Gu, WX, Gu, YF, Guo, YN, Han, SW, Han, Y, Harris, FA, He, J, He, JT, He, M, Hitlin, DG, Hu, GY, Hu, JL, Hu, QH, Hu, T, Hu, XQ, Huang, XP, Huang, YZ, Izen, JM, Jia, QP, Jiang, CH, Jin, S, Jin, Y, Jones, L, Kang, SH, Ke, ZJ, Kelsey, MH, Kim, BK, Kong, D, Lai, YF, Lan, HB, Lang, PF, Lankford, A, Li, J, Li, PQ, Li, Q, Li, RB, Li, W, Li, WD, Li, WG, Li, XH, Li, XN, Lin, SZ, Lu, F, Liu, HM, Liu, J, Liu, JH, Liu, Q, Liu, RG, Liu, Y, Liu, ZA, Lou, XC, Lowery, B, Lu, JG, Lu, JY, Luo, SQ, Luo, Y, Ma, AM, Ma, EC, Ma, JM, Mao, HS, Mao, ZP, Malchow, R, Mandelkern, M, Meng, XC, Ni, HL, Nie, J, Olsen, SL, Oyang, J, Paluselli, D, and Pan, LJ

Subjects
Down Syndrome, Brain Disorders, Intellectual and Developmental Disabilities (IDD), Intellectual and Developmental Disabilities, Nuclear & Particles Physics, Astronomical and Space Sciences, Atomic, Molecular, Nuclear, Particle and Plasma Physics, Quantum Physics, Atomic, Molecular, Nuclear, Particle and Plasma Physics
Abstract

The absolute inclusive semileptonic branching fraction of the [Formula presented] meson has been measured based on [Formula presented] of [Formula presented] collision data collected with the Beijing Spectrometer at [Formula presented] At this energy, the [Formula presented] are produced in pairs: [Formula presented] We reconstructed [Formula presented] [Formula presented] events in five hadronic decay modes. In the recoil system of these events, several [Formula presented] inclusive semileptonic decays were observed and the branching fraction is estimated to be [Formula presented] © 1997 The American Physical Society.

Published
1997

5. Direct Measurement of the Pseudoscalar Decay Constant, fDs

Author

Bai, JZ, Bardon, O, Blum, I, Breakstone, A, Burnett, T, Chen, GP, Chen, HF, Chen, J, Chen, SJ, Chen, SM, Chen, Y, Chen, YB, Chen, YQ, Cheng, BS, Cowan, RF, Cui, HC, Cui, XZ, Ding, HL, Du, ZZ, Dunwoodie, W, Fan, XL, Fang, J, Fero, M, Gao, CS, Gao, ML, Gao, SQ, Gao, WX, Gratton, P, Gu, JH, Gu, SD, Gu, WX, Gu, YF, Guo, YN, Han, SW, Han, Y, Harris, FA, Hatanaka, M, He, J, He, KR, He, M, Hitlin, DG, Hu, GY, Hu, HB, Hu, T, Hu, XQ, Huang, DQ, Huang, YZ, Izen, JM, Jia, QP, Jiang, CH, Jin, Y, Jones, L, Kang, SH, Kelsey, MH, Kim, BK, Lai, YF, Lan, HB, Lang, PF, Lankford, A, Li, F, Li, J, Li, PQ, Li, Q, Li, RB, Li, W, Li, WD, Li, WG, Li, X, Li, XN, Lin, SZ, Liu, HM, Liu, JH, Liu, Q, Liu, RG, Liu, Y, Liu, ZA, Lou, XC, Lowery, B, Lu, JG, M., A, C., E, M., J, Mao, HS, Mao, ZP, Malchow, R, Mandelkern, M, Meng, XC, Ni, HL, Nie, J, Olsen, SL, Oyang, J, Paluselli, D, Pan, LJ, Panetta, J, Porter, F, Prabhakar, E, Qi, ND, Que, YK, Quigley, J, and Rong, G

Subjects
Nuclear and Plasma Physics, Particle and High Energy Physics, Mathematical Physics, Mathematical Sciences, Physical Sciences, Intellectual and Developmental Disabilities (IDD), Down Syndrome, Brain Disorders, Engineering, General Physics, Mathematical sciences, Physical sciences
Abstract

The Beijing Spectrometer (BES) experiment has observed purely leptonic decays of the Ds meson in the reaction e+e-→Ds+Ds- at a c.m. energy of 4.03 GeV. Three events are observed in which one Ds decays hadronically to φπ, K̄*0K, or K̄0K, and the other decays leptonically to μνμ or τντ. With the assumption of μ-τ universality, values of the branching fraction, B(Ds→μνμ)=(1.5-0.6-0.2+1.3+0.3)%, and the Ds pseudoscalar decay constant, fDs=(4.3-1.3-0.4+1.5+0.4)×102 MeV, are obtained. © 1995 The American Physical Society.

Published
1995

6. Direct measurement of the pseudoscalar decay constant, fDs.

Author

Bai, JZ, Bardon, O, Blum, I, Breakstone, A, Burnett, T, Chen, GP, Chen, HF, Chen, J, Chen, SJ, Chen, SM, Chen, Y, Chen, YB, Chen, YQ, Cheng, BS, Cowan, RF, Cui, HC, Cui, XZ, Ding, HL, Du, ZZ, Dunwoodie, W, Fan, XL, Fang, J, Fero, M, Gao, CS, Gao, ML, Gao, SQ, Gao, WX, Gratton, P, Gu, JH, Gu, SD, Gu, WX, Gu, YF, Guo, YN, Han, SW, Han, Y, Harris, FA, Hatanaka, M, He, J, He, KR, He, M, Hitlin, DG, Hu, GY, Hu, HB, Hu, T, Hu, XQ, Huang, DQ, Huang, YZ, Izen, JM, Jia, QP, Jiang, CH, Jin, Y, Jones, L, Kang, SH, Kelsey, MH, Kim, BK, Lai, YF, Lan, HB, Lang, PF, Lankford, A, Li, F, Li, J, Li, PQ, Li, Q, and Li, RB

Subjects
Brain Disorders, Intellectual and Developmental Disabilities (IDD), Down Syndrome, General Physics, Physical Sciences
Abstract

The Beijing Spectrometer (BES) experiment has observed purely leptonic decays of the Ds meson in the reaction e+e-→Ds+Ds- at a c.m. energy of 4.03 GeV. Three events are observed in which one Ds decays hadronically to φπ, K̄*0K, or K̄0K, and the other decays leptonically to μνμ or τντ. With the assumption of μ-τ universality, values of the branching fraction, B(Ds→μνμ)=(1.5-0.6-0.2+1.3+0.3)%, and the Ds pseudoscalar decay constant, fDs=(4.3-1.3-0.4+1.5+0.4)×102 MeV, are obtained. © 1995 The American Physical Society.

Published
1995

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