Author: W.S. LockmanPublisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
A Study of the Alphasub 0(980) Meson in Radiative J/psi Decays
Author: W.S. LockmanA Study of The. Alpha. Sub 0 (980) Meson in Radiative J/. Psi. Decays
Author: Publisher:
ISBN:
Category :
Languages : en
Pages : 6
Book Description
Using the decay sequence J/? →?X, X → a0{sup {plus minus}}(980)?{sup {minus plus}}, a0{sup {plus minus}}(980) →??{sup {plus minus}}, where X is the f1(1285) or?(1400), the?? vs??− Dalitz plot intensity distributions are fitted with a model containing a coupled-channel parametrization of the a0(980). Preliminary values for the spin of X, the mass and width of the a0{sup {plus minus}}(980) to??{sup {plus minus}}, and the ratio of a0+(980) coupling strengths, g{sub K}2/g{sub?}2, to {bar K}°K+ and??+ are determined. From this model, the predictions for the ratios of branching ratios r{sub X} = B(X → a0(980)?){center dot}B(a0(980) → K{bar K})/B(X → a0{sup {plus minus}}(980)?){center dot}B(a0{sup {plus minus}}(980) →??{sup {plus minus}}) are compared with those obtained from MARK III Partial Waves analyses of the decays J/? →?K{sub s}°K{sup {plus minus}}?{sup {minus plus}} and J/? →?{eta}?+?−. 12 refs., 3 figs., 4 tabs.
A Study of Meson Spectroscopy and Radiative J/Psi Decay Into Four Charged Pions
Author: Steven G. SutliefPublisher:
ISBN:
Category : Gluons
Languages : en
Pages : 117
Book Description
Gluonic Mesons in J/[psi] Radiative Decay
![Gluonic Mesons in J/[psi] Radiative Decay PDF](https://books.google.com/books/content/images/frontcover/8uT7jwEACAAJ?fife=w80-h100)
Author: A Study of the Antiproton-proton Spectrum in Radiative J/Psi Decay
Author: Arla Dea GuyPublisher:
ISBN:
Category : Mass spectrometry
Languages : en
Pages : 240
Book Description
Radiative Decays of the Psi(3097) to Two Meson Final States
Author: Publisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
The MARK III detector operating at the SPEAR storage ring has acquired a sample of 2.7 x 106 produced psi(3097)'s. These events are used to investigate the radiative decays of the psi to two meson final states. Such decays are of topical interest because of the unusual QCD laboratory they provide - of particular interest is the possibility of observing glueball states. The process psi ..-->.. ..gamma pi ... pi..− is studied. The f(1270) tensor meson is observed and the helicity structure of its production is measured. The data indicate that helicity 2 is suppressed, in disagreement with lowest order QCD calculations. Evidence is presented for the first observation of the theta(1700) in the ..pi ... pi..− final state. The strong, but not complete, suppression of this state in the ..pi pi.. channel, combined with the absence of a J/sup P/ = 2+ signal in a recent MARK III analysis of psi ..-->.. ..gamma.. rho rho, suggest a very mysterious nature for the theta(1700). The process psi ..-->.. ..gamma..K+K− is also studied. The f'(1515) tensor meson is observed with a branching ratio in agreement with the SU(3) symmetry prediction for the standard two gluon radiative decay diagram with no mixing corrections. The helicity structure of the f'(1515) is measured for the first time, and is found to be similar to that of the f(1270). The theta(1700) is observed with high statistics. Its spin and parity are measured, with the result that J/sup P/ = 2+ is preferred over J/sup P/ = 0+ at the 99.9% C.L. In addition, evidence is presented for a remarkable narrow state, designated the xi(2220). Its parameters are measured to be: m = 2.218 +- 0.003 +- 0.010 GeV, GAMMA less than or equal to 0.040 GeV at 95% C.L., and BR(psi ..-->.. ..gamma..xi(2220))BR(xi(2220) ..-->.. K+K−) = (5.7 +- 1.9 +- 1.4) x 10−5.
A Study of Some Rare Radiative Meson Decays
Author: Stephen Alan RichardsonPSI Radiative Decays
Author: Publisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
Inclusive and exclusive measurements of psi radiative decay are presented. The magnitude of hard inclusive radiative decay is comparable to the prediction f first order QCD, but the measured spectrum is considerably softer. In addition to measurements of radiative decays to the known pseudoscalar and tensor mesons, a sizable decay to a resonance of mass 144015/sup +10/ MeV/c2 in the K anti K.pi. mode is observed. This may be the E(1420) meson. Supporting evidence is presented for the existence of the n/sub c/ at a mass of 2980 MeV/c2.
Radiative Decay of the Psi (2S) Into Two Pseudoscalar Mesons
Author: Publisher:
ISBN:
Category :
Languages : en
Pages : 5
Book Description
Radiative decays of the radically excited charmonium resonance, [psi](2S), into [pi][pi], K{bar K} and [eta][eta] final states have been measured in a sample of 3.96 x 106 [psi](2S) events collected by the BES collaboration. The branching ratios B([psi](2S) 2![gamma]f2(1270)) = (2.27 ± 0.26 ± 0.39) x 10−4 and B([psi](2S) 2![gamma]f0(1710)) x B(f0(1710) 2!KK−) = (5.59 ± 1.12 ± 0.93) x 10−5 are obtained. When compared to the corresponding radiative J/[psi] decays, the observed [psi](2S) radiative decay rates into [gamma]f2(1270) and [gamma]f0(1710) are consistent with the ''15%'' rule.
Author: Philip R. Page