Observation Of A Narrow Resonance In The D Sub S Pi System At 2 32 Gev C2 With Babar
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Observation Of A Narrow Resonance In The D Sub S Sup Pi Sup 0 System At 2 32 Gev C Sup 2 With Babar
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Author :
language : en
Publisher:
Release Date : 2004
Observation Of A Narrow Resonance In The D Sub S Sup Pi Sup 0 System At 2 32 Gev C Sup 2 With Babar written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2004 with categories.
A new state with invariant mass near 2.32 GeV=c[sup 2] has been observed by the BABAR Collaboration in the inclusive D[sub s][sup +] [pi][sup 0] mass distribution using 91 fb[sup -1] of e[sup +]e[sup -] annihilation data taken at the PEP-II asymmetric-energy storage ring at energies near 10.6 GeV. The new state is narrow, with an observed width that is consistent with the experimental resolution. This narrow width combined with the quantum numbers of the final state imply that the decay is isospin-violating. The state has natural spin-parity, and its low mass suggests a J[sup P] = 0[sup +] assignment.
Observation Of A Narrow Resonance In The D Sub S Pi System At 2 32 Gev C2 With Babar
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Author :
language : en
Publisher:
Release Date : 2004
Observation Of A Narrow Resonance In The D Sub S Pi System At 2 32 Gev C2 With Babar written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2004 with categories.
A new state with invariant mass near 2.32 GeV=c2 has been observed by the BABAR Collaboration in the inclusive D{sub s} [pi]° mass distribution using 91 fb−1 of ee− annihilation data taken at the PEP-II asymmetric-energy storage ring at energies near 10.6 GeV. The new state is narrow, with an observed width that is consistent with the experimental resolution. This narrow width combined with the quantum numbers of the final state imply that the decay is isospin-violating. The state has natural spin-parity, and its low mass suggests a J{sup P} = 0+ assignment.
Observation In Babar Of A Narrow Resonance In The D Sub S Pi Sup 0 System At 2317 Mev C Sup 2
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Author :
language : en
Publisher:
Release Date : 2004
Observation In Babar Of A Narrow Resonance In The D Sub S Pi Sup 0 System At 2317 Mev C Sup 2 written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2004 with categories.
The BABAR collaboration has observed a state of mass 2317 MeV/c[sup 2] which decays to D[sub s][pi][sup 0], using 91 fb[sup -1] of data from asymmetric e[sup +]e[sup -] collisions of energy around 10.6 GeV produced by the PEP-II storage ring. The observed width is compatible with the experimental resolution, indicating that the state is narrow, with [Gamma]
Observation In Babar Of A Narrow Resonance In The D Sub S Pi System At 2317 Mev C2
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Author :
language : en
Publisher:
Release Date : 2004
Observation In Babar Of A Narrow Resonance In The D Sub S Pi System At 2317 Mev C2 written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2004 with categories.
The BABAR collaboration has observed a state of mass 2317 MeV/c2 which decays to D{sub s}[pi]°, using 91 fb−1 of data from asymmetric ee− collisions of energy around 10.6 GeV produced by the PEP-II storage ring. The observed width is compatible with the experimental resolution, indicating that the state is narrow, with [Gamma]
Observation Of A Broad Structure In The Pi Pi J Psi Mass Spectrum Around 4 26g Ev C2
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Author :
language : en
Publisher:
Release Date : 2005
Observation Of A Broad Structure In The Pi Pi J Psi Mass Spectrum Around 4 26g Ev C2 written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2005 with categories.
The authors study initial-state radiation events, ee− →?{sub ISR}?+?− J/?, with data collected with the BABAR detector. They observe an accumulation of events near 4.26 GeV/c2 in the invariant-mass spectrum of?+?− J/?. Fits of the mass spectrum indicate that a broad resonance with a mass of about 4.26 GeV/c2 is required to describe the observed structure. The presence of additional narrow resonances cannot be excluded. The fitted width of the broad resonance is 50 to 90 MeV/c2, depending on the fit hypothesis.
Recent Babar Results In Charmonium And Charm Spectroscopy
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Author :
language : en
Publisher:
Release Date : 2005
Recent Babar Results In Charmonium And Charm Spectroscopy written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2005 with categories.
Recent results are presented on the study of the [eta]{sub c} and [eta]{sub c}(2S) resonance parameters and on the observation of two narrow states in the D{sub s} spectrum, using the BABAR data set. The [eta]{sub c} and [eta]{sub c}(2S) are produced in [gamma][gamma] interactions: a precision measurement of their mass and total width is reported, together with a study supporting the correct assignment of the [eta]{sub c}(2S) quantum numbers. Two states D*{sub sJ 2317}, D{sub sJ 2457} are observed in continuum e+e− production, decaying to D{sub s}+ [pi]°[gamma] respectively: their masses are measured and a study on the resonant structure of the D{sub sJ}+(2457) decay is reported. All results are preliminary.
Babar Results On The Ds System
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Author :
language : en
Publisher:
Release Date : 2004
Babar Results On The Ds System written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2004 with categories.
The surprising discovery by the BABAR Collaboration of a narrow state with a mass of 2317 MeV decaying to D[sub s] [pi][sup 0] has been followed by other spectroscopic revelations. We focus on the BABAR results for the second state, at 2458 MeV, but mention related work from other experiments.
A Narrow Centrally Produced 3 Pi Resonance At 1080 Mev C2
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Author : Kjell M. Danielsen
language : en
Publisher:
Release Date : 1992
A Narrow Centrally Produced 3 Pi Resonance At 1080 Mev C2 written by Kjell M. Danielsen and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1992 with categories.
Search For Narrow Resonances In Pp P Pi N At 2 Gev
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Author :
language : en
Publisher:
Release Date : 1980
Search For Narrow Resonances In Pp P Pi N At 2 Gev written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1980 with categories.
A preliminary analysis of an experiment designed as a sensitive dibaryon resonance search in the reaction pp.-->.p.pi.n is presented. At 2 GeV/c incident momentum, 440,000 unambiguously reconstructed events were obtained. In this preliminary analysis, the results are reported of a search of the pn mass spectrum for evidence of chain decays of possible dibaryon resonances, i.e. pp.-->.d/sup **/, d/sup **/.-->.d/sup **/.pi./sup +/, d/sup */.-->.pn. No evidence of narrow peaks (less than or equal to 7 MeV) is seen in the data for cross-section-times-branching-ratio greater than 50 .mu.b.
Measurement Of The D S Leptonic Decay Constant F D S And Observation Of New Resonances Decaying To D Pi
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Author : Jose Feliciano Benitez
language : en
Publisher: Stanford University
Release Date : 2011
Measurement Of The D S Leptonic Decay Constant F D S And Observation Of New Resonances Decaying To D Pi written by Jose Feliciano Benitez and has been published by Stanford University this book supported file pdf, txt, epub, kindle and other format this book has been release on 2011 with categories.
The absolute branching fractions for the decays $D^-_s\rightarrow\ell^-\bar{\nu}_{\ell}$ ($\ell=e$, $\mu$, or $\tau$) are measured using a data sample corresponding to an integrated luminosity of 521 fb$^{-1}$ collected at center of mass energies near 10.58 GeV with the BABAR detector at the PEP-II $e^+e^-$ collider at SLAC. The number of $D_s^-$ mesons is determined by reconstructing the recoiling system $DKX\gamma$ in events of the type $e^+e^-{\rightarrow}DKXD^{*-}_s$, where $D^{*-}_s\rightarrow D^-_s\gamma$ and $X$ represents additional pions from fragmentation. The $D^-_s\rightarrow\ell^-\nu_{\ell}$ events are detected by full or partial reconstruction of the recoiling system $DKX\gamma\ell$. The following results are obtained: $B(D^-_s \to \mu^- \nu) = (6.02 \pm 0.38 \pm 0.34) \times 10^{-3}$, $B(D^-_s \to \tau^- \nu) = (5.00 \pm 0.35 \pm 0.49) \times 10^{-2}$, and $B(D^-_s \to e^- \nu)