Download or read book 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 published by . This book was released on 2004 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.

Download or read book 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 published by . This book was released on 2004 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: 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]

Download or read book Observation of a Narrow Resonance in the D sub S pi System at 2 32 GeV C2 with BABAR written by and published by . This book was released on 2004 with total page 5 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.

Download or read book Observation in BaBar of a Narrow Resonance in the D sub S Pi System at 2317 MeV c2 written by and published by . This book was released on 2004 with total page 5 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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]

Download or read book Search for Narrow Resonances in Pp P Pi N at 2 GeV written by and published by . This book was released on 1980 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.

Download or read book 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 published by . This book was released on 2006 with total page 21 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.

Download or read book Prins Almenjors och prinsessan Saras m rkv rdiga k rlekshandel Fri fvers ttning fr n franskan bo tryckt hos Johan C Frenckell 1799 written by and published by . This book was released on 1799 with total page 68 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book BaBar Results on the Ds System written by and published by . This book was released on 2004 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.

Download or read book Study of the Exclusive Initial State RadiationProduction of the D bar D System written by B. Aubert and published by . This book was released on 2006 with total page 15 pages. Available in PDF, EPUB and Kindle. Book excerpt: A study of exclusive production of the D{bar D} system through initial-state radiation is performed in a search for charmonium states, where D = D{sup 0} or D{sup +}. The D{sup 0} mesons are reconstructed in the D{sup 0} {yields} K{sup -}{pi}{sup +}, D{sup 0} {yields} K{sup -}{pi}{sup +}{pi}{sup 0}, and D{sup 0} {yields} K{sup -}{pi}{sup +}{pi}{sup +}{pi}{sup -} decay modes. The D{sup +} is reconstructed through the D{sup +} {yields} K{sup -}{pi}{sup +}{pi}{sup +} decay mode. The analysis makes use of an integrated luminosity of 288.5 fb{sup -1} collected by the BABAR experiment. The D{bar D} mass spectrum shows a clear {psi}(3770) signal. Further structures appear in the 3.9 and 4.1 GeV/c{sup 2} regions. No evidence is found for Y(4260) decays to D{bar D}, implying an upper limit {Beta}(Y(4260) {yields} D{bar D})/{Beta}(Y(4260) {yields} J/{psi}{pi}{sup +}{pi}{sup -})

Download or read book BaBar Results on the Ds System written by R. Cahn and published by . This book was released on 2003 with total page 7 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.

Download or read book Spectroscopy of the D wave Q bar Q System Evidence for Two J sup P written by and published by . This book was released on 1992 with total page 5 pages. Available in PDF, EPUB and Kindle. Book excerpt: Evidence is presented for two J[sup p] = 2[minus] strange mesons; one at [approx] 1.77 and the other at [approx] 1.82 GeV/c[sup 2]. These states have been observed in a partial wave analysis of the K[sup [minus]][omega] system in the reaction K[sup [minus]]p [yields] K[sup [minus]][pi]+[pi][sup [minus]][pi][sup 0]p where the strange mesons decay into K[sup [minus]][omega] and the [omega] then decays to [pi]+[pi][sup [minus]][pi][sup 0]. The data set contains [approx] 10[sup 5] K[sup [minus]][omega]p events at 11 GeV/c taken with the LASS spectrometer at SLAC.

Download or read book Measurement of the D sub sJ 2317 and D sub sJ 2460 Properties in E sup e sup C C bar Production written by and published by . This book was released on 2004 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The properties of the D*[sub sJ](2317)[sup +] and D[sub sJ](2460)[sup +] mesons are studied using 125 fb[sup -1] of e[sup +]e[sup -] --> c[bar c] data collected by the BaBar experiment. Preliminary mass estimates of [2318.9 [+-] 0.3 (stat.) [+-] 0.9 (syst.)] MeV/c[sup 2] and [2459.4 [+-] 0.3 (stat.) [+-] 1.0 (syst.)] MeV/c[sup 2] are obtained. Searches are performed for the decay to the D[sub s][sup +] meson along with one or more [pi][sup 0], [pi][sup +], or [gamma] particles. A search is also performed for neutral and doubly-charged partners.

Download or read book High statistics Search for A sup 0 sub 1 and H sup 0 In Pi sup p Pi sup Pi sup Pi sup 0 at 8 4 GeV c written by and published by . This book was released on 1976 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: A search is made for the hitherto unobserved neutral J/sup P/ = 1/sup +/ objects A/sub 1//sup 0/ and H/sup 0/ produced in the reaction .pi./sup -/p .-->. .pi./sup +/.pi./sup -/.pi./sup 0/ .-->. .gamma gamma. n at 8.4 GeV/c. Both charged pions and both .gamma.'s are measured in the Charged and Neutral Spectrometer at the Argonne ZGS. Preliminary results from a first-pass analysis of 45 percent of the data, containing approximately 900 events/10MeV/c/sup 2/ mass bin at 1100 MeV/c/sup 2/ are reported. Strong peaks at the eta, .omega., A/sub 2/, and .omega.(1670) dominate the spectrum. The possible presence of less prominent structure is discussed.

Download or read book Search for D sub sJ 2632 at BaBar written by and published by . This book was released on 2004 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.

Download or read book Observation of a Broad Structure in the pi pi J psi Mass Spectrum Around 4 26G eV c2 written by and published by . This book was released on 2005 with total page 7 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.

Download or read book Finding the Charm in 800 GeV c P Cu and P Be Single Muon Spectra written by Stephen A. Klinksiek and published by . This book was released on 2005 with total page 300 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book J psi Radiative Decay to Two Pseudoscalar Mesons from Mark III written by and published by . This book was released on 2003 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The results of amplitude analyses of the Mark III data on the K[sub s][sup 0]K[sub s][sup 0], K[sup+]K[sup -] and[pi][sup+][pi][sup -] systems produced in J/[psi] radiative decay are shown for the mass range 1--2 GeV. The intensity distributions for the amplitudes having J[sup PC] values 0[sup+2] and 2[sup+2] are presented and discussed. The observed strong production of the f[sub 0](1700) in J/[psi] radiative decay suggests that this state may consist primarily of the lightest scalar glueball state. No significant production of spin 2 is observed in the 1.7 GeV mass region.