Measurement of an excess of (B)over-bar → D(*) τ-(v)over-barτ decays and implications for charged Higgs bosons

被引：487

作者：

Lees, J. P. ^{[1
]}

Poireau, V. ^{[1
]}

Tisserand, V. ^{[1
]}

Grauges, E. ^{[2
]}

Palano, A. ^{[3
,4
]}

Eigen, G. ^{[5
]}

Stugu, B. ^{[5
]}

Brown, D. N. ^{[6
,7
,42
]}

Kerth, L. T. ^{[6
,7
]}

Kolomensky, Yu. G. ^{[6
,7
]}

Lee, M. ^{[6
,7
]}

Lynch, G. ^{[6
,7
]}

Koch, H. ^{[8
]}

Schroeder, T. ^{[8
]}

Hearty, C. ^{[9
]}

Mattison, T. S. ^{[9
]}

McKenna, J. A. ^{[9
]}

So, R. Y. ^{[9
]}

Khan, A. ^{[10
]}

Blinov, V. E. ^{[11
]}

Buzykaev, A. R. ^{[11
]}

Druzhinin, V. P. ^{[11
]}

Golubev, V. B. ^{[11
]}

Kravchenko, E. A. ^{[11
]}

Onuchin, A. P. ^{[11
]}

Serednyakov, S. I. ^{[11
]}

Skovpen, Yu. I. ^{[11
]}

Solodov, E. P. ^{[11
]}

Todyshev, K. Yu. ^{[11
]}

Yushkov, A. N. ^{[11
]}

Kirkby, D. ^{[12
]}

Lankford, A. J. ^{[12
]}

Mandelkern, M. ^{[12
]}

Dey, B. ^{[13
]}

Gary, J. W. ^{[13
]}

Long, O. ^{[13
]}

Vitug, G. M. ^{[13
]}

Campagnari, C. ^{[14
]}

Sevilla, M. Franco ^{[14
]}

Hong, T. M. ^{[14
]}

Kovalskyi, D. ^{[14
]}

Richman, J. D. ^{[14
]}

West, C. A. ^{[14
]}

Eisner, A. M. ^{[15
]}

Lockman, W. S. ^{[15
]}

Martinez, A. J. ^{[15
]}

Schumm, B. A. ^{[15
]}

Seiden, A. ^{[15
]}

Chao, D. S. ^{[16
]}

Cheng, C. H. ^{[16
]}

机构：

[1] Univ Savoie, CNRS, IN2P3, Lab Annecy Le Vieux Phys Particules, F-74941 Annecy Le Vieux, France

[2] Univ Barcelona, Dept ECM, Fac Fis, E-08028 Barcelona, Spain

[3] Ist Nazl Fis Nucl, Sez Bari, I-70126 Bari, Italy

[4] Univ Bari, Dipartimento Fis, I-70126 Bari, Italy

[5] Univ Bergen, Inst Phys, N-5007 Bergen, Norway

[6] Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA

[7] Univ Calif Berkeley, Berkeley, CA 94720 USA

[8] Ruhr Univ Bochum, Inst Expt Phys 1, D-44780 Bochum, Germany

[9] Univ British Columbia, Vancouver, BC V6T 1Z1, Canada

[10] Brunel Univ, Uxbridge UB8 3PH, Middx, England

[11] SB RAS, Budker Inst Nucl Phys, Novosibirsk 630090, Russia

[12] Univ Calif Irvine, Irvine, CA 92697 USA

[13] Univ Calif Riverside, Riverside, CA 92521 USA

[14] Univ Calif Santa Barbara, Santa Barbara, CA 93106 USA

[15] Univ Calif Santa Cruz, Inst Particle Phys, Santa Cruz, CA 95064 USA

[16] CALTECH, Pasadena, CA 91125 USA

[17] Univ Cincinnati, Cincinnati, OH 45221 USA

[18] Univ Colorado, Boulder, CO 80309 USA

[19] Colorado State Univ, Ft Collins, CO 80523 USA

[20] Tech Univ Dortmund, Fac Phys, D-44221 Dortmund, Germany

[21] Tech Univ Dresden, Inst Kern & Teilchenphys, D-01062 Dresden, Germany

[22] Ecole Polytech, CNRS, IN2P3, Lab Leprince Ringuet, F-91128 Palaiseau, France

[23] Univ Edinburgh, Edinburgh EH9 3JZ, Midlothian, Scotland

[24] Ist Nazl Fis Nucl, Sez Ferrara, I-44122 Ferrara, Italy

[25] Univ Ferrara, Dipartimento Fis & Sci Terra, I-44122 Ferrara, Italy

[26] Ist Nazl Fis Nucl, Lab Nazl Frascati, I-00044 Frascati, Italy

[27] Ist Nazl Fis Nucl, Sez Genova, I-16146 Genoa, Italy

[28] Univ Genoa, Dipartimento Fis, I-16146 Genoa, Italy

[29] Indian Inst Technol Guwahati, Gauhati 781039, Assam, India

[30] Harvard Univ, Cambridge, MA 02138 USA

[31] Heidelberg Univ, Inst Phys, D-69120 Heidelberg, Germany

[32] Humboldt Univ, Inst Phys, D-12489 Berlin, Germany

[33] Univ London Imperial Coll Sci Technol & Med, London SW7 2AZ, England

[34] Univ Iowa, Iowa City, IA 52242 USA

[35] Iowa State Univ, Ames, IA 50011 USA

[36] Johns Hopkins Univ, Baltimore, MD 21218 USA

[37] Univ Paris 11, CNRS, IN2P3, Lab Accerateur Lineaire,Ctr Sci Orsay, F-91898 Orsay, France

[38] Lawrence Livermore Natl Lab, Livermore, CA 94550 USA

[39] Univ Liverpool, Liverpool L69 7ZE, Merseyside, England

[40] Univ London, London E1 4NS, England

[41] Univ London Royal Holloway & Bedford New Coll, Egham TW20 0EX, Surrey, England

[42] Univ Louisville, Louisville, KY 40292 USA

[43] Johannes Gutenberg Univ Mainz, Inst Kernphys, D-55099 Mainz, Germany

[44] Univ Manchester, Manchester M13 9PL, Lancs, England

[45] Univ Maryland, College Pk, MD 20742 USA

[46] MIT, Nucl Sci Lab, Cambridge, MA 02139 USA

[47] McGill Univ, Montreal, PQ H3A 2T8, Canada

[48] Ist Nazl Fis Nucl, Sez Milano, I-20133 Milan, Italy

[49] Univ Milan, Dipartimento Fis, I-20133 Milan, Italy

[50] Univ Mississippi, University, MS 38677 USA

来源：

PHYSICAL REVIEW D | 2013年 / 88卷 / 07期

基金：

加拿大自然科学与工程研究理事会; 美国国家科学基金会; 英国科学技术设施理事会;

关键词：

MESON DECAYS; MODEL;

D O I：

10.1103/PhysRevD.88.072012

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Based on the full BABAR data sample, we report improved measurements of the ratios R(D) = B((B) over bar -> D tau(-)(v) over bar (tau))/B((B) over bar -> Dl(-)(v) over bar (l)) and R(D*) = B((B) over bar -> D*tau(-)(v) over bar (tau))/B((B) over bar -> D*l(-)(v) over bar (l)), where l refers to either an electron or muon. These ratios are sensitive to new physics contributions in the form of a charged Higgs boson. We measure R(D) = 0.440 +/- 0.058 +/- 0.042 and R(D*) = 0.332 +/- 0.024 +/- 0.018, which exceed the standard model expectations by 2.0 sigma and 2.7 sigma, respectively. Taken together, the results disagree with these expectations at the 3.4 sigma level. This excess cannot be explained by a charged Higgs boson in the type II two-Higgs-doublet model. Kinematic distributions presented here exclude large portions of the more general type III two-Higgs-doublet model, but there are solutions within this model compatible with the results.

引用

页数：30

共 50 条

[1] Measurement of the semileptonic decays (B)over-bar → Dτ-(ν)over-barτ and (B)over-bar → D*τ-(ν)over-barτ
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Lees, J. P.
Poireau, V.
Prencipe, E.
Prudent, X.
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Tico, J. Garra
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Lopez, L.
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