排序方式: 共有42条查询结果,搜索用时 31 毫秒
11.
12.
13.
14.
15.
V. Cavasinni T. Del Prete M. Morganti F. Schiavo M. Valdata-Nappi G. Carboni D. Lloyd Owen M. Ambrosio G. Barbarino G. Paternoster S. Patricelli G. Anzivino 《Zeitschrift fur Physik C Particles and Fields》1984,21(4):299-305
We investigated correlations between pairs of charged secondaries produced in antiproton-proton and proton-proton interactions at a centre-of-mass energy of 31 GeV using the pseudorapidity variable η=?ln (tanθ/2). Positive, short-range correlations were observed in both reactions. In the antiproton-proton case, however, there is a stronger correlation at very short range when both particles are produced in the central region and when the charged multiplicity of the event is about 30% higher than the mean. A simple Monte Carlo calculation indicates that quark-antiquark annihilation into two hadronic jets could account for the observed effect. 相似文献
16.
M. Ambrosio G. Anzivino G. Barbarino U. Becker G. Carboni V. Cavasinni T. Del Prete G. Kantardjian D. Lloyd Owen M. Morganti J. Paradiso G. Paternoster S. Patricelli M. Steuer M. Valdata-Nappi 《Physics letters. [Part B]》1982,113(4):347-352
We measured the elastic scattering of and of αp at . For αα, the differential cross section dσ/dt has a diffractive pattern minima at |t| = 0.10 and 0.38 GeV2. At small |t| = 0.05?0.07 GeV2, this cross section behaves like exp[(100 ± 10) t]. Extrapolating a fit to the data to the optical point, we obtained for the total cross section αtot(αα) = 250 ± 50 mb and an integrated elastic cross section σe1(αα) = 45 ± mb. Another method of estimating σtot(αα), based on measuring the interaction rate, yielded 295 ± 40 mb. For αp, dσ/dt has aminimum at |t| = 0.20 GeV2, and for 0.05 < |t| < 0.18 GeV2 behaves like exp[(41 ± 2) t]. Extrapolating this slope to |t| = 0, we found σtot(αp) = 130 ± 20 and σe1(αp) = 20 ± 4mb. Results on pp elastic scattering at agree with previous ISR experiments. 相似文献
17.
G. Barbiellini A. Barletta M. Ambrosio G. Barbarino M. Castellano G. Paternoster S. Patricelli L. Tortora U. Troya C. Bemporad G. Brosco M. Calvetti F. Costantini G.R. Giannini P. Lariccia R. Biancastelli 《Physics letters. [Part B]》1977,68(4):397-401
We present experimental evidence for a resonant behaviour of the hadron production from e+e? annihilations at the e+e? storage ring ADONE. A Breit-Wigner fit to the enhancement present between 1800 and 1850 MeV gives the following parameters M = 1812?13+7 MeV, Γ = 34?15+21 MeV. 相似文献
18.
19.
20.