Analysis of the resonant components in (B)over-bar0 → J/ψπ+π-

被引：64

作者：

Aaij, R. ^{[39
]}

Abellan Beteta, C. ^{[34
,72
]}

Adametz, A. ^{[11
]}

Adeva, B. ^{[35
]}

Adinolfi, M. ^{[44
]}

Adrover, C. ^{[6
]}

Affolder, A. ^{[50
]}

Ajaltouni, Z. ^{[5
]}

Albrecht, J. ^{[9
]}

Alessio, F. ^{[36
]}

Alexander, M. ^{[49
]}

Ali, S. ^{[39
]}

Alkhazov, G. ^{[27
]}

Alvarez Cartelle, P. ^{[35
]}

Alves, A. A., Jr. ^{[22
,36
]}

Amato, S. ^{[2
]}

Amhis, Y. ^{[7
]}

Anderlini, L. ^{[17
,64
]}

Anderson, J. ^{[38
]}

Andreassen, R. ^{[54
,58
]}

Appleby, R. B. ^{[52
]}

Gutierrez, O. Aquines ^{[10
]}

Archilli, F. ^{[18
]}

Artamonov, A. ^{[33
]}

Artuso, M. ^{[54
]}

Aslanides, E. ^{[6
]}

Auriemma, G. ^{[22
,71
]}

Bachmann, S. ^{[11
]}

Back, J. J. ^{[46
]}

Baesso, C. ^{[2
,55
]}

Balagura, V. ^{[28
]}

Baldini, W. ^{[16
]}

Barlow, R. J. ^{[52
]}

Barschel, C. ^{[36
]}

Barsuk, S. ^{[7
]}

Barter, W. ^{[45
]}

Bauer, Th. ^{[39
]}

Bay, A. ^{[37
]}

Beddow, J. ^{[49
]}

Bediaga, I. ^{[1
]}

Belogurov, S. ^{[28
]}

Belous, K. ^{[33
]}

Belyaev, I. ^{[28
]}

Ben-Haim, E. ^{[8
]}

Benayoun, M. ^{[8
]}

Bencivenni, G. ^{[18
]}

Benson, S. ^{[48
]}

Benton, J. ^{[44
]}

Berezhnoy, A. ^{[29
]}

Bernet, R. ^{[38
]}

机构：

[1] CBPF, Rio De Janeiro, Brazil

[2] Univ Fed Rio de Janeiro, Rio de Janeiro, Brazil

[3] Tsinghua Univ, Ctr High Energy Phys, Beijing 100084, Peoples R China

[4] Univ Savoie, CNRS IN2P3, LAPP, Annecy Le Vieux, France

[5] Univ Blaise Pascal, Clermont Univ, CNRS IN2P3, LPC, Clermont Ferrand, France

[6] Aix Marseille Univ, CPPM, CNRS IN2P3, Marseille, France

[7] Univ Paris 11, LAL, CNRS IN2P3, Orsay, France

[8] Univ Paris Diderot, Univ Paris 06, CNRS IN2P3, LPNHE, Paris, France

[9] Tech Univ Dortmund, Fak Phys, Dortmund, Germany

[10] MPIK, Heidelberg, Germany

[11] Heidelberg Univ, Inst Phys, Heidelberg, Germany

[12] Univ Coll Dublin, Sch Phys, Dublin 2, Ireland

[13] Sez INFN Bari, Bari, Italy

[14] Sez INFN Bologna, Bologna, Italy

[15] Sez INFN Cagliari, Cagliari, Italy

[16] Sez INFN Ferrara, Ferrara, Italy

[17] Sez INFN Firenze, Florence, Italy

[18] Ist Nazl Fis Nucl, Lab Nazl, Frascati, Italy

[19] Sez INFN Genova, Genoa, Italy

[20] Sez INFN Milano Bicocca, Milan, Italy

[21] Sez INFN Roma Tor Vergata, Rome, Italy

[22] Sez INFN Roma La Sapienza, Rome, Italy

[23] Polish Acad Sci, Henryk Niewodniczanski Inst Nucl Phys, Krakow, Poland

[24] AGH Univ Sci & Technol, Krakow, Poland

[25] Natl Ctr Nucl Res NCBJ, Warsaw, Poland

[26] Horia Hulubei Natl Inst Phys & Nucl Engn, Bucharest, Romania

[27] PNPI, Gatchina, Russia

[28] ITEP, Moscow, Russia

[29] Moscow State Univ SINP MSU, Inst Nucl Phys, Moscow, Russia

[30] Russian Acad Sci INR RAN, Inst Nucl Res, Moscow, Russia

[31] Budker Inst Nucl Phys SB RAS, Novosibirsk, Russia

[32] Novosibirsk State Univ, Novosibirsk 630090, Russia

[33] IHEP, Protvino, Russia

[34] Univ Barcelona, Barcelona, Spain

[35] Univ Santiago de Compostela, Santiago De Compostela, Spain

[36] European Org Nucl Res CERN, Geneva, Switzerland

[37] Ecole Polytech Fed Lausanne, CH-1015 Lausanne, Switzerland

[38] Univ Zurich, Inst Phys, Zurich, Switzerland

[39] Nikhef Natl Inst Subatom Phys, Amsterdam, Netherlands

[40] Vrije Univ Amsterdam, Amsterdam, Netherlands

[41] NSC KIPT, Kharkov, Ukraine

[42] Natl Acad Sci KINR, Inst Nucl Res, Kiev, Ukraine

[43] Univ Birmingham, Birmingham, W Midlands, England

[44] Univ Bristol, HH Wills Phys Lab, Bristol BS8 1TL, Avon, England

[45] Univ Cambridge, Cavendish Lab, Cambridge CB3 0HE, England

[46] Univ Warwick, Dept Phys, Coventry CV4 7AL, W Midlands, England

[47] STFC Rutherford Appleton Lab, Didcot, Oxon, England

[48] Univ Edinburgh, Sch Phys & Astron, Edinburgh, Midlothian, Scotland

[49] Univ Glasgow, Sch Phys & Astron, Glasgow, Lanark, Scotland

[50] Univ Liverpool, Oliver Lodge Lab, Liverpool L69 3BX, Merseyside, England

来源：

PHYSICAL REVIEW D | 2013年 / 87卷 / 05期

基金：

美国国家科学基金会;

关键词：

B-S(0); SIGMA;

D O I：

10.1103/PhysRevD.87.052001

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Interpretation of CP violation measurements using charmonium decays, in both the (B) over bar (0) and (B) over bar (0)(s) systems, can be subject to changes due to "penguin" type diagrams. These effects can be investigated using measurements of the Cabibbo-suppressed (B) over bar (0) -> J/psi pi(+)pi-decays. The final state composition of this channel is investigated using a 1.0 fb(-1) sample of data produced in 7 TeV pp collisions at the LHC and collected by the LHCb experiment. A modified Dalitz-plot analysis is performed using both the invariant mass spectra and the decay angular distributions. An improved measurement of the (B) over bar (0) -> J/psi pi(+)pi(-)branching fraction of (3.97 +/- 0.09 +/- 0.11 +/- 0.16) x 10(-5) is reported where the first uncertainty is statistical, the second is systematic, and the third is due to the uncertainty of the branching fraction of the decay B- -> J/psi K- used as a normalization channel. Significant production of f(0)(500) and rho(770) resonances is found in the substructure of the J/psi pi(+)pi(-) final state, and this indicates that they are viable final states for CP violation studies. In contrast evidence for the f(0)(980) resonance is not found. This allows us to establish the first upper limit on the branching fraction product B((B) over bar (0) -> J/psi f(0)(980)) x B(f(0)(980) -> pi(+)pi(-)) < 1.1 x 10(-6), leading to an upper limit on the absolute value of the mixing angle of the f(0)(980) with the f(0)(500) of less than 31 degrees, both at 90% confidence level. DOI: 10.1103/PhysRevD.87.052001

引用

页数：21

共 52 条

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