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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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]

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.

Babar Results On The Ds System

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Author : R. Cahn
language : en
Publisher:
Release Date : 2003

Babar Results On The Ds System written by R. Cahn and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2003 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.

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.

Measurement Of The Mass And Width And Study Of The Spin Of The Xi 1690 0 Resonance From Lambdac Lambda Anti K0 K Decay At Babar

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Author : B. Aubert
language : en
Publisher:
Release Date : 2006

Measurement Of The Mass And Width And Study Of The Spin Of The Xi 1690 0 Resonance From Lambdac Lambda Anti K0 K Decay At Babar written by B. Aubert and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2006 with categories.

The {Xi}(1690){sup 0} resonance is observed in the {Lambda}{bar K}{sup 0} channel in the decay {Lambda}{sub c}{sup +} {yields} {Lambda}{bar K}{sup 0}K{sup +}, from a data sample corresponding to a total integrated luminosity of {approx} 200 fb{sup -1} recorded by the BABAR detector at the PEP-II asymmetric-energy e+e- collider operating at {approx} 10.58 GeV and {approx} 10.54 GeV center-of-mass energies. A fit to the Dalitz plot intensity distribution corresponding to the coherent superposition of amplitudes describing {Lambda}a{sub 0}(980){sup +} and {Xi}(1690){sup 0} K{sup +} production yields mass and width values of 1684.7 {+-} 1.3(stat.){sub -1.6}{sup +2.2}(syst.) MeV/c{sup 2}, and 8.1{sub -3.5}{sup +3.9}(stat.){sub -0.9}{sup +1.0}(syst.) MeV, respectively, for the {Xi}(1690){sup 0}, while the spin is found to be consistent with value of 1/2 on the basis of studies of the ({Lambda}K{sub S}) angular distribution.

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Author :
language : en
Publisher:
Release Date : 1997

written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1997 with categories.

Search For D Sub Sj 2632 At Babar

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Author :
language : en
Publisher:
Release Date : 2004

Search For D Sub Sj 2632 At 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.

The authors performed a search for the D[sub sJ]*(2632)[sup +] state recently reported by the SELEX Collaboration at FNAL. This preliminary analysis makes use of an integrated luminosity of 125 fb[sup -1] collected by the BABAR detector at the PEP-II asymmetric-energy e[sup +]e[sup -] collider. The resulting D[sub s][sup +][eta] and D[sup 0]K[sup +] mass spectra show no evidence for the D[sub sJ]*(2632)[sup +] state. In addiition, no signal is observed in the D*[sup +] K[sub S] mass spectrum.

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.

Observation Of Eta C 1s And Eta C 2s Decays To K K Pi Pi Pi0 In Two Photon Interactions

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Author :
language : en
Publisher:
Release Date : 2011

Observation Of Eta C 1s And Eta C 2s Decays To K K Pi Pi Pi0 In Two Photon Interactions written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2011 with categories.

We study the processes?? → K{sub S}°K{sup ±}?{sup {-+}} and?? → KK−?+?−?° using a data sample of 519.2 fb−1 recorded by the BABAR detector at the PEP-II asymmetric-energy e+e− collider at center-of-mass energies near the?(nS) (n = 2, 3, 4) resonances. We observe the?{sub c}(1S),?{sub c0}(1P),?{sub c2}(1P), and?{sub c}(2S) resonances produced in two-photon interactions and decaying to K+K−?+?−?°, with significances of 18.1, 5.7, 5.2, and 5.3 standard deviations (including systematic errors), respectively. We measure the?{sub c}(2S) mass and width in K{sub S}°K{sup ±}?{sup {-+}} decays, m(?{sub c}(2S)) = 3638.5 ± 1.5 ± 0.8 MeV/c2 and?(?{sub c}(2S)) = 13.4 {+-} 4.6 {+-} 3.2 MeV, where the first uncertainty is statistical and the second is systematic. We search for the Z(3930) resonance and find no significant signal. We also provide the two-photon width times branching fraction values for the observed resonances.

Charmless Quasi Two Body Modes At Babar

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Author : F. Palombo
language : en
Publisher:
Release Date : 2005

Charmless Quasi Two Body Modes At Babar written by F. Palombo 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.

We present results for measurements of B{sup 0} meson decays to charmless final states {eta}K{sup 0}, {eta}{omega}, a{sub 1}{sup +}(1260){pi}{sup -} with a{sub 1}{sup +}(1260) {yields} {pi}{sup +}{pi}{sup +}{pi}{sup -}, {rho}{sup 0}K{sub S}{sup 0}, K{sub S}{sup 0}K{sub S}{sup 0}K{sub S}{sup 0}, and of B{sup +} to {eta}{rho}{sup +} and {eta}{prime}{pi}{sup +}. Analyses are based on data taken with the BABAR detector at the PEP-II asymmetric-energy B factory at SLAC.