We report a study of the process γγ→X→ηcπ+π−, where X stands for one of the resonances χc2(1P), ηc(2S), X(3872), X(3915), or χc2(2P). The analysis is performed with a data sample of 473.9  fb−1 collected with the BABAR detector at the PEP-II asymmetric-energy electron-positron collider. We do not observe a significant signal for any channel, and calculate 90% confidence-level upper limits on the products of branching fractions and two-photon widths ΓX→γγℬ(X→ηcπ+π−): 15.7 eV for χc2(1P), 133 eV for ηc(2S), 11.1 eV for X(3872) (assuming it to be a spin-2 state), 16 eV for X(3915) (assuming it to be a spin-2 state), and 18 eV for χc2(2P). We also report upper limits on the ratios of branching fractions ℬ(ηc(2S)→ηcπ+π−)/ℬ(ηc(2S)→K0SK+π−)<10.0 and ℬ(χc2(1P)→ηcπ+π−)/ℬ(χc2(1P)→K0SK+π−)<32.9 at the 90% confidence level.

Lees, J.P., Poireau, V., Tisserand, V., Garra Tico, J., Grauges, E., Palano, A., et al. (2012). Search for resonances decaying to eta(c)pi(+) pi(-) in two-photon interactions. PHYSICAL REVIEW D, PARTICLES, FIELDS, GRAVITATION, AND COSMOLOGY, 86(9), 1-10 [10.1103/PhysRevD.86.092005].

Search for resonances decaying to eta(c)pi(+) pi(-) in two-photon interactions

PATRIGNANI, CLAUDIA;
2012

Abstract

We report a study of the process γγ→X→ηcπ+π−, where X stands for one of the resonances χc2(1P), ηc(2S), X(3872), X(3915), or χc2(2P). The analysis is performed with a data sample of 473.9  fb−1 collected with the BABAR detector at the PEP-II asymmetric-energy electron-positron collider. We do not observe a significant signal for any channel, and calculate 90% confidence-level upper limits on the products of branching fractions and two-photon widths ΓX→γγℬ(X→ηcπ+π−): 15.7 eV for χc2(1P), 133 eV for ηc(2S), 11.1 eV for X(3872) (assuming it to be a spin-2 state), 16 eV for X(3915) (assuming it to be a spin-2 state), and 18 eV for χc2(2P). We also report upper limits on the ratios of branching fractions ℬ(ηc(2S)→ηcπ+π−)/ℬ(ηc(2S)→K0SK+π−)<10.0 and ℬ(χc2(1P)→ηcπ+π−)/ℬ(χc2(1P)→K0SK+π−)<32.9 at the 90% confidence level.
2012
Lees, J.P., Poireau, V., Tisserand, V., Garra Tico, J., Grauges, E., Palano, A., et al. (2012). Search for resonances decaying to eta(c)pi(+) pi(-) in two-photon interactions. PHYSICAL REVIEW D, PARTICLES, FIELDS, GRAVITATION, AND COSMOLOGY, 86(9), 1-10 [10.1103/PhysRevD.86.092005].
Lees, J. P.; Poireau, V.; Tisserand, V.; Garra Tico, J.; Grauges, E.; Palano, A.; Eigen, G.; Stugu, B.; Brown, D. N.; Kerth, L. T.; Kolomensky, Yu. G....espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/537417
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