We have reconstructed the radiative decays chi(b)(1P) --> Y(1S)gamma and chi(b)(2P) --> Y(1S)gamma in (p) over bar p collisions at root s = 1.8 TeV, and measured the fraction of Y(1S) mesons that originate-from these decays. For Y(1S) mesons with p(T)(Y) > 8.0 GeV/c, the fractions that come from chi(b)(1P) and chi(b)(2P) decays are [27.1 +/- 619(stat) +/- 4.4(syst)]% and [10.5 +/- 4.4(stat) +/- 1.4(syst)]%, respectively. We have derived the fraction of directly produced Y(1S) mesons to be [50.9 +/- 8.2(stat) +/- 9.0(syst)]%.

T., A., H., A., A., A., M. G., A., P., A., S. R., A., et al. (2000). Production of Upsilon(1S) Mesons from chi(b) decays in p(p)over-bar collisions at root s=1.8 TeV. PHYSICAL REVIEW LETTERS, 84(10), 2094-2099 [10.1103/PhysRevLett.84.2094].

Production of Upsilon(1S) Mesons from chi(b) decays in p(p)over-bar collisions at root s=1.8 TeV

PAOLETTI, RICCARDO;TURINI, NICOLA;
2000-01-01

Abstract

We have reconstructed the radiative decays chi(b)(1P) --> Y(1S)gamma and chi(b)(2P) --> Y(1S)gamma in (p) over bar p collisions at root s = 1.8 TeV, and measured the fraction of Y(1S) mesons that originate-from these decays. For Y(1S) mesons with p(T)(Y) > 8.0 GeV/c, the fractions that come from chi(b)(1P) and chi(b)(2P) decays are [27.1 +/- 619(stat) +/- 4.4(syst)]% and [10.5 +/- 4.4(stat) +/- 1.4(syst)]%, respectively. We have derived the fraction of directly produced Y(1S) mesons to be [50.9 +/- 8.2(stat) +/- 9.0(syst)]%.
2000
T., A., H., A., A., A., M. G., A., P., A., S. R., A., et al. (2000). Production of Upsilon(1S) Mesons from chi(b) decays in p(p)over-bar collisions at root s=1.8 TeV. PHYSICAL REVIEW LETTERS, 84(10), 2094-2099 [10.1103/PhysRevLett.84.2094].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11365/40280
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