Measurement of the resonant and CP components in (B)over-bar(0) -> J/psi pi(+)pi(-) decays

R. Aaij; J.F.J. van den Brand; L.C. Garcia; K. De Bruyn; C. Farinelli; V.A.M. Heijne; T.J. Ketel; R. Koopman; D.M. Lambert; R.W. Lambert; J. van Leerdam; Y.J. Li; M.H.M. Merk; S. Oggero; H.G. Raven; M. Schiller; V. Syropoulos; S. Tolk; M. Garcia; S. Wu

doi:10.1103/PhysRevD.90.012003

Measurement of the resonant and CP components in (B)over-bar(0) -> J/psi pi(+)pi(-) decays

R. Aaij, J.F.J. van den Brand, L.C. Garcia, K. De Bruyn, C. Farinelli, V.A.M. Heijne, T.J. Ketel, R. Koopman, D.M. Lambert, R.W. Lambert, J. van Leerdam, Y.J. Li, M.H.M. Merk, S. Oggero, H.G. Raven, M. Schiller, V. Syropoulos, S. Tolk, M. Garcia, S. Wu

(Astro)-Particles Physics

Research output: Contribution to Journal › Article › Academic › peer-review

Abstract

The resonant structure of the reaction B̄0→J/ψπ+π- is studied using data from 3fb-1 of integrated luminosity collected by the LHCb experiment, one third at 7 TeV center-of-mass energy and the remainder at 8 TeV. The invariant mass of the π+π- pair and three decay angular distributions are used to determine the fractions of the resonant and nonresonant components. Six interfering π+π- states, ρ(770), f0(500), f2(1270), ρ(1450), ω(782) and ρ(1700), are required to give a good description of invariant mass spectra and decay angular distributions. The positive and negative charge parity fractions of each of the resonant final states are determined. The f0(980) meson is not seen and the upper limit on its presence, compared with the observed f0(500) rate, is inconsistent with a model where these scalar mesons are formed from two quarks and two antiquarks (tetraquarks) at the eight standard deviation level. In the qq̄ model, the absolute value of the mixing angle between the f0(980) and the f0(500) scalar mesons is limited to be less than 17° at 90% confidence level. © 2014 CERN, for the LHCb collaboration.

Original language	English
Pages (from-to)	012003-012003
Journal	Physical Review D
Volume	90
Issue number	1
DOIs	https://doi.org/10.1103/PhysRevD.90.012003
Publication status	Published - 2014

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PT: J; NR: 41; TC: 7; J9: PHYS REV D; PG: 21; GA: AL5JK; UT: WOS:000339169600001

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Aaij, R., van den Brand, J. F. J., Garcia, L. C., De Bruyn, K., Farinelli, C., Heijne, V. A. M., Ketel, T. J., Koopman, R., Lambert, D. M., Lambert, R. W., van Leerdam, J., Li, Y. J., Merk, M. H. M., Oggero, S., Raven, H. G., Schiller, M., Syropoulos, V., Tolk, S., Garcia, M., & Wu, S. (2014). Measurement of the resonant and CP components in (B)over-bar(0) -> J/psi pi(+)pi(-) decays. Physical Review D, 90(1), 012003-012003. https://doi.org/10.1103/PhysRevD.90.012003

@article{9a07c2fb68b04a449dae336813d51c9f,

title = "Measurement of the resonant and CP components in (B)over-bar(0) -> J/psi pi(+)pi(-) decays",

abstract = "The resonant structure of the reaction {\=B}0→J/ψπ+π- is studied using data from 3fb-1 of integrated luminosity collected by the LHCb experiment, one third at 7 TeV center-of-mass energy and the remainder at 8 TeV. The invariant mass of the π+π- pair and three decay angular distributions are used to determine the fractions of the resonant and nonresonant components. Six interfering π+π- states, ρ(770), f0(500), f2(1270), ρ(1450), ω(782) and ρ(1700), are required to give a good description of invariant mass spectra and decay angular distributions. The positive and negative charge parity fractions of each of the resonant final states are determined. The f0(980) meson is not seen and the upper limit on its presence, compared with the observed f0(500) rate, is inconsistent with a model where these scalar mesons are formed from two quarks and two antiquarks (tetraquarks) at the eight standard deviation level. In the q{\=q} model, the absolute value of the mixing angle between the f0(980) and the f0(500) scalar mesons is limited to be less than 17° at 90% confidence level. {\textcopyright} 2014 CERN, for the LHCb collaboration.",

author = "R. Aaij and {van den Brand}, J.F.J. and L.C. Garcia and {De Bruyn}, K. and C. Farinelli and V.A.M. Heijne and T.J. Ketel and R. Koopman and D.M. Lambert and R.W. Lambert and {van Leerdam}, J. and Y.J. Li and M.H.M. Merk and S. Oggero and H.G. Raven and M. Schiller and V. Syropoulos and S. Tolk and M. Garcia and S. Wu",

note = "PT: J; NR: 41; TC: 7; J9: PHYS REV D; PG: 21; GA: AL5JK; UT: WOS:000339169600001",

year = "2014",

doi = "10.1103/PhysRevD.90.012003",

language = "English",

volume = "90",

pages = "012003--012003",

journal = "Physical Review D",

issn = "1550-7998",

publisher = "American Physical Society",

number = "1",

}

Aaij, R, van den Brand, JFJ, Garcia, LC, De Bruyn, K, Farinelli, C, Heijne, VAM, Ketel, TJ, Koopman, R, Lambert, DM, Lambert, RW, van Leerdam, J, Li, YJ, Merk, MHM, Oggero, S, Raven, HG, Schiller, M, Syropoulos, V, Tolk, S, Garcia, M & Wu, S 2014, 'Measurement of the resonant and CP components in (B)over-bar(0) -> J/psi pi(+)pi(-) decays', Physical Review D, vol. 90, no. 1, pp. 012003-012003. https://doi.org/10.1103/PhysRevD.90.012003

TY - JOUR

T1 - Measurement of the resonant and CP components in (B)over-bar(0) -> J/psi pi(+)pi(-) decays

AU - Aaij, R.

AU - van den Brand, J.F.J.

AU - Garcia, L.C.

AU - De Bruyn, K.

AU - Farinelli, C.

AU - Heijne, V.A.M.

AU - Ketel, T.J.

AU - Koopman, R.

AU - Lambert, D.M.

AU - Lambert, R.W.

AU - van Leerdam, J.

AU - Li, Y.J.

AU - Merk, M.H.M.

AU - Oggero, S.

AU - Raven, H.G.

AU - Schiller, M.

AU - Syropoulos, V.

AU - Tolk, S.

AU - Garcia, M.

AU - Wu, S.

N1 - PT: J; NR: 41; TC: 7; J9: PHYS REV D; PG: 21; GA: AL5JK; UT: WOS:000339169600001

PY - 2014

Y1 - 2014

N2 - The resonant structure of the reaction B̄0→J/ψπ+π- is studied using data from 3fb-1 of integrated luminosity collected by the LHCb experiment, one third at 7 TeV center-of-mass energy and the remainder at 8 TeV. The invariant mass of the π+π- pair and three decay angular distributions are used to determine the fractions of the resonant and nonresonant components. Six interfering π+π- states, ρ(770), f0(500), f2(1270), ρ(1450), ω(782) and ρ(1700), are required to give a good description of invariant mass spectra and decay angular distributions. The positive and negative charge parity fractions of each of the resonant final states are determined. The f0(980) meson is not seen and the upper limit on its presence, compared with the observed f0(500) rate, is inconsistent with a model where these scalar mesons are formed from two quarks and two antiquarks (tetraquarks) at the eight standard deviation level. In the qq̄ model, the absolute value of the mixing angle between the f0(980) and the f0(500) scalar mesons is limited to be less than 17° at 90% confidence level. © 2014 CERN, for the LHCb collaboration.

AB - The resonant structure of the reaction B̄0→J/ψπ+π- is studied using data from 3fb-1 of integrated luminosity collected by the LHCb experiment, one third at 7 TeV center-of-mass energy and the remainder at 8 TeV. The invariant mass of the π+π- pair and three decay angular distributions are used to determine the fractions of the resonant and nonresonant components. Six interfering π+π- states, ρ(770), f0(500), f2(1270), ρ(1450), ω(782) and ρ(1700), are required to give a good description of invariant mass spectra and decay angular distributions. The positive and negative charge parity fractions of each of the resonant final states are determined. The f0(980) meson is not seen and the upper limit on its presence, compared with the observed f0(500) rate, is inconsistent with a model where these scalar mesons are formed from two quarks and two antiquarks (tetraquarks) at the eight standard deviation level. In the qq̄ model, the absolute value of the mixing angle between the f0(980) and the f0(500) scalar mesons is limited to be less than 17° at 90% confidence level. © 2014 CERN, for the LHCb collaboration.

U2 - 10.1103/PhysRevD.90.012003

DO - 10.1103/PhysRevD.90.012003

M3 - Article

VL - 90

SP - 12003

EP - 12003

JO - Physical Review D

JF - Physical Review D

SN - 1550-7998

IS - 1

ER -

Measurement of the resonant and CP components in (B)over-bar(0) -> J/psi pi(+)pi(-) decays

Abstract

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