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Title: Search for narrow resonances below the {upsilon} mesons

Abstract

We have investigated the invariant mass spectrum of dimuons collected by the CDF experiment during the 1992-1995 run of the Fermilab Tevatron collider to improve the limit on the existence of narrow resonances set by the experiments at the SPEAR e{sup +}e{sup -} collider. In the mass range 6.3-9.0 GeV/c{sup 2}, we derive 90% upper credible limits to the ratio of the production cross section times muonic branching fraction of possible narrow resonances to that of the {upsilon}(1S) meson. In this mass range, the average limit varies from 1.7 to 0.5%. This limit is much worse at the mass of 7.2 GeV/c{sup 2} due to an excess of 250{+-}61 events with a width consistent with the detector resolution.

Authors:
;  [1]; ; ; ; ; ;  [2];  [3]; ; ;  [4];  [5];  [6]
  1. Fermi National Accelerator Laboratory, Batavia, Illinois 60510 (United States)
  2. Laboratori Nazionali di Frascati, Istituto Nazionale di Fisica Nucleare, Frascati (Italy)
  3. Ernest Orlando Lawrence Berkeley National Laboratory, Berkeley, California 94720 (United States)
  4. Istituto Nazionale di Fisica Nucleare, University and Scuola Normale Superiore of Pisa, I-56100 Pisa (Italy)
  5. Istituto Nazionale di Fisica Nucleare, Universita di Padova, Sezione di Padoova, I-35131, Padova (Italy)
  6. Harvard University, Cambridge, Massachusetts 02138 (United States)
Publication Date:
OSTI Identifier:
20713804
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physical Review. D, Particles Fields; Journal Volume: 72; Journal Issue: 9; Other Information: DOI: 10.1103/PhysRevD.72.092003; (c) 2005 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; BRANCHING RATIO; ELECTRON-POSITRON INTERACTIONS; ETA MESONS; FERMILAB COLLIDER DETECTOR; GEV RANGE; LEPTONIC DECAY; MASS SPECTRA; PARTICLE IDENTIFICATION; PARTICLE WIDTHS; RESOLUTION; RESONANCE PARTICLES; REST MASS; UPSILON-9460 MESONS

Citation Formats

Apollinari, G., Velev, G., Barone, M., Giromini, P., Happacher, F., Miscetti, S., Parri, A., Ptohos, F., Carithers, W., Dell'Orso, M., Fiori, I., Giannetti, P., Dorigo, T., and Franklin, M. Search for narrow resonances below the {upsilon} mesons. United States: N. p., 2005. Web. doi:10.1103/PhysRevD.72.092003.
Apollinari, G., Velev, G., Barone, M., Giromini, P., Happacher, F., Miscetti, S., Parri, A., Ptohos, F., Carithers, W., Dell'Orso, M., Fiori, I., Giannetti, P., Dorigo, T., & Franklin, M. Search for narrow resonances below the {upsilon} mesons. United States. doi:10.1103/PhysRevD.72.092003.
Apollinari, G., Velev, G., Barone, M., Giromini, P., Happacher, F., Miscetti, S., Parri, A., Ptohos, F., Carithers, W., Dell'Orso, M., Fiori, I., Giannetti, P., Dorigo, T., and Franklin, M. Tue . "Search for narrow resonances below the {upsilon} mesons". United States. doi:10.1103/PhysRevD.72.092003.
@article{osti_20713804,
title = {Search for narrow resonances below the {upsilon} mesons},
author = {Apollinari, G. and Velev, G. and Barone, M. and Giromini, P. and Happacher, F. and Miscetti, S. and Parri, A. and Ptohos, F. and Carithers, W. and Dell'Orso, M. and Fiori, I. and Giannetti, P. and Dorigo, T. and Franklin, M.},
abstractNote = {We have investigated the invariant mass spectrum of dimuons collected by the CDF experiment during the 1992-1995 run of the Fermilab Tevatron collider to improve the limit on the existence of narrow resonances set by the experiments at the SPEAR e{sup +}e{sup -} collider. In the mass range 6.3-9.0 GeV/c{sup 2}, we derive 90% upper credible limits to the ratio of the production cross section times muonic branching fraction of possible narrow resonances to that of the {upsilon}(1S) meson. In this mass range, the average limit varies from 1.7 to 0.5%. This limit is much worse at the mass of 7.2 GeV/c{sup 2} due to an excess of 250{+-}61 events with a width consistent with the detector resolution.},
doi = {10.1103/PhysRevD.72.092003},
journal = {Physical Review. D, Particles Fields},
number = 9,
volume = 72,
place = {United States},
year = {Tue Nov 01 00:00:00 EST 2005},
month = {Tue Nov 01 00:00:00 EST 2005}
}
  • The authors have investigated the invariant mass spectrum of dimuons collected by the CDF experiment during the 1992-1995 run of the Fermilab Tevatron collider to improve the limit on the existence of narrow resonances set by the experiments at the SPEAR e{sup +}e{sup -} collider. In the mass range 6.3-9.0 GeV/c{sup 2} they derive an average 90% upper credible limit of 8 eV to the leptonic width of possible resonances. This limit is much worse at the mass of 7.2 GeV/c{sup 2} due to an excess of 250 {+-} 61 events with a width consistent with the detector resolution.
  • We report a search for narrow resonances, produced in p{bar p} collisions at {radical}s = 1.96 TeV, that decay into muon pairs with invariant mass between 6.3 and 9.0 GeV/c{sup 2}. The data, collected with the CDF II detector at the Fermilab Tevatron collider, correspond to an integrated luminosity of 630 pb{sup -1}. We use the dimuon invariant mass distribution to set 90% upper credible limits of about 1% to the ratio of the production cross section times muonic branching fraction of possible narrow resonances to that of the {Upsilon}(1S) meson.
  • The production of the UPSILON family in proton-nucleus collisions is clarified by a sixfold increase in statistics. Constraining UPSILON,UPSILON' masses to those observed at DORIS we find the statistical significance of the UPSILON'' to be 11 standard deviations. The dependence of UPSILON production on p/sub t/, y, and s is presented. Limits for other resonance production in the mass range 4-18 GeV are determined.
  • We report a search for narrow resonances, produced inmore » $$p\bar{p}$$ collisions at $$\sqrt{s}$$=1.96 TeV, that decay into muon pairs with invariant mass between 6.3 and 9.0 GeV/c 2. The data, collected with the CDF II detector at the Fermilab Tevatron collider, correspond to an integrated luminosity of 630 pb -1. We use the dimuon invariant mass distribution to set 90% upper credible limits of about 1% to the ratio of the production cross section times muonic branching fraction of possible narrow resonances to that of the Υ(1S) meson.« less
  • Charged lepton flavor violating processes are unobservable in the standard model, but they are predicted to be enhanced in several extensions to the standard model, including supersymmetry and models with leptoquarks or compositeness. We present a search for such processes in a sample of 99 x 10{sup 6} {Upsilon}(2S) decays and 117 x 10{sup 6} {Upsilon}(3S) decays collected with the BABAR detector. We place upper limits on the branching fractions {Beta}({Upsilon}(nS) {yields} e{sup {+-}}{tau}{sup {-+}}) and {Beta}({Upsilon}(nS) {yields} {mu}{sup {+-}}{tau}{sup {-+}}) (n = 2, 3) at the 10{sup -6} level and use these results to place lower limits of ordermore » 1 TeV on the mass scale of charged lepton flavor violating effective operators.« less