| 21. |
A New Narrow Resonance in theDs&pgr;0System |
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AIP Conference Proceedings,
Volume 688,
Issue 1,
1903,
Page 238-251
B. Meadows,
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摘要:
A sample of ∼ 91 fb−1ofe+e−interactions at center of mass energy near 10.6 GeV/cfrom the PEP‐II asymmetric collider at SLAC has been examined by theBABARcollaboration. Evidence for a narrow state with mass 2317 MeV/c2decaying toDs+&pgr;0is found. These data, showing the signal and properties of the state, are presented. Evidence for a second state at ∼2460 MeV/c2decaying toDss&pgr;0is also shown. Data from other experiments are shown, and possible implications of the existence of these states discussed. © 2003 American Institute of Physics
ISSN:0094-243X
DOI:10.1063/1.1632210
出版商:AIP
年代:1903
数据来源: AIP
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| 22. |
Phase Motion of the Scalar &pgr;&pgr; Amplitudes inD+,Ds+ → &pgr;−&pgr;+&pgr;+Decays |
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AIP Conference Proceedings,
Volume 688,
Issue 1,
1903,
Page 252-265
Ignacio Bediaga,
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摘要:
We make a direct and model‐independent measurement of the low &pgr;+&pgr;−mass phase motion in theD+→ &pgr;−&pgr;+&pgr;+decay. Our preliminary results show a strong phase variation, compatible with the isoscalar &sgr;(500) meson. This result confirms our previous result where we found evidence for the existence of this scalar particle using full Dalitz‐plot analysis. We apply the Amplitude Difference (AD) method to the same Fermilab E791 data sample used in the preceding analysis. We also give an example of how we extract the phase motion of the scalar amplitude, looking at thef0(980) inDs+ → &pgr;−&pgr;+&pgr;+decay. © 2003 American Institute of Physics
ISSN:0094-243X
DOI:10.1063/1.1632211
出版商:AIP
年代:1903
数据来源: AIP
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| 23. |
The Scalar &kgr; fromD+→ &Kgr;−&pgr;+&pgr;+: Further Studies |
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AIP Conference Proceedings,
Volume 688,
Issue 1,
1903,
Page 266-275
Carla Go¨bel,
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摘要:
We briefly review the recent results obtained by Fermilab experiment E791 on the Dalitz plot analysis of the decayD+→ &Kgr;−&pgr;+&pgr;+, where indication for a light &Kgr;&pgr; scalar resonance, the &kgr;, was found. We also present preliminary studies providing further information on the phase behavior of the scalar components at low mass, supporting the previous indication for the &kgr;. © 2003 American Institute of Physics
ISSN:0094-243X
DOI:10.1063/1.1632212
出版商:AIP
年代:1903
数据来源: AIP
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| 24. |
Light quark and charm interplay in the Dalitz‐plot analysis of hadronic decays in FOCUS |
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AIP Conference Proceedings,
Volume 688,
Issue 1,
1903,
Page 276-292
S. Malvezzi,
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摘要:
The potentiality of interpreting theD‐meson decay‐dynamics has revealed itself to be strongly dependent on our understanding of the light‐meson sector. The statistics collected by FOCUS is already at a level that manifests parametrization problems for scalar particles. In this paper the first application of theK‐matrixapproach in the charm sector is illustrated and preliminary results on theD+andDsdecays to three pions are shown. © 2003 American Institute of Physics
ISSN:0094-243X
DOI:10.1063/1.1632213
出版商:AIP
年代:1903
数据来源: AIP
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