Date

Reactions K- p --> Xi- K0+ pi+0 between 2210 and 2435 MeV Ecm

Bellefon, A.de ; Berthon, A. ; Billoir, P. ;
Nuovo Cim.A 28 (1975) 289, 1975.
Inspire Record 108004 DOI 10.17182/hepdata.37713

We give resonant and production cross-sections for the Ξ*-resonances produced in the reactions Ξ−K+π0 and Ξ−π+K0 for 7 incident-K− momenta between 1.93 and 2.52 GeV/c. A partial-wave analysis gives evidence for the existence of a resonance in theD5-state in this mass region.

1 data table match query

No description provided.


Measurement of event shape distributions and moments in e+ e- --> hadrons at 91-GeV - 209-GeV and a determination of alpha(s).

The OPAL collaboration Abbiendi, G. ; Ainsley, C. ; Akesson, P.F. ; et al.
Eur.Phys.J.C 40 (2005) 287-316, 2005.
Inspire Record 669402 DOI 10.17182/hepdata.48652

We have studied hadronic events from e+e- annihilation data at centre-of-mass energies from 91 to 209 GeV. We present distributions of event shape observables and their moments at each energy and compare with QCD Monte Carlo models. From the event shape distributions we extract the strong coupling alpha_s and test its evolution with energy scale. The results are consistent with the running of alpha_s expected from QCD. Combining all data, the value of alpha_s(M_Z) is determined to be alpha_s(M_Z) = 0.1191 +- 0.0005 (stat.) +- 0.0010 (expt.) +- 0.0011 (hadr.) +- 0.0044 (theo.). The energy evolution of the moments is also used to determine a value of alpha_s with slightly larger errors: alpha_s(M_Z) = 0.1223 +- 0.0005 (stat.) +- 0.0014 (expt.) +- 0.0016 (hadr.) +0.0054 -0.0036 (theo.).

27 data tables match query

Measured normalized differential distribution for 1-THRUST.

Measured normalized differential distribution for HEAVY-JET-MASS.

Measured normalized differential distribution for C-PARAMETER.

More…

Inclusive particle production in 400-GeV/c p p interactions

Aguilar-Benitez, M. ; Allison, W.W. W. ; Batalov, A.A. ; et al.
Z.Phys.C 50 (1991) 405-426, 1991.
Inspire Record 314091 DOI 10.17182/hepdata.1435

We report on a study of inclusive particle production in pp-interactions at 400 GeV/c. The data are based on 472 K reconstructed events recorded in the NA 27 experiment using the LEBC-EHS facility at CERN. The production cross sections are determined of pseudo scalar (π±,0, η andK±), scalar (f0(975)), vector (ρ±,0(770), ω(783), ϕ(1020),K*0(892), and\(\bar K^{ * 0} \)(892)), and tensorf0 mesons, of protons and antiprotons, and theΔ++,+,0(1232), and Λ(1520) baryon resonances in the forward hemisphere of the center of mass system, as well as longitudinal and transverse momentum distributions. The results are compared with predictions of the FRITIOF model and with other experimental data.

61 data tables match query

No description provided.

No description provided.

No description provided.

More…

pi0 and eta meson production in pi+ p and K+ p collisions at 250-GeV/c

The EHS/NA22 collaboration Atayan, M.R. ; Botterweck, F. ; Charlet, M. ; et al.
Z.Phys.C 54 (1992) 247-254, 1992.
Inspire Record 322980 DOI 10.17182/hepdata.14597

We report on a study of inclusiveπ0 and η meson production inπ+p andK+p interactions at 250 GeV/c beam momentum. The Feynman-x spectrum ofπ0 is very similar in shape and normalization to that of negatively charged particles produced in the same experiment. The results are compared with data at other energies and with FRITIOF model predictions. This model overestimates the η cross section by a factor of 2.5. It reproduces theπ0 cross section correctly, but predicts a too hardπ0x distribution.

15 data tables match query

Data from Gamma Detectors only.

Data from Gamma Detectors only.

Data from RCBC only.

More…

Deuteron production in collisions of 250-GeV/c pi+ and K+ mesons with Al and Au nuclei.

The EHS/NA22 collaboration Agababyan, N.M. ; Boettcher, H. ; Botterweck, F. ; et al.
Z.Phys.C 52 (1991) 231-238, 1991.
Inspire Record 324034 DOI 10.17182/hepdata.14927

Experimental data are presented on deuteron production in the target fragmentation region for 250 GeV/c π+ interactions with Al and Au nuclei, and compared with analogous data on proton production. Indications are observed for narrow structures in the (dπ-) effective mass system at ∼2.04 and ∼2.08 GeV.

18 data tables match query

Number of weighted events as a function of number of forward produced deuterons.

Number of weighted events as a function of number of forward produced deuterons.

Mean deuteron multiplicity.

More…

Neutral strange particle production in K+ and pi+ collisions with Al and Au nuclei at 250-GeV/c

The NA22 collaboration Botterweck, F. ; Charlet, M. ; Chliapnikov, P.V. ; et al.
Z.Phys.C 55 (1992) 373-382, 1992.
Inspire Record 333307 DOI 10.17182/hepdata.14584

Data are presented on inclusiveKs0 and Λ production inK+ and π+ collisions with Al and Au nuclei at 250 GeV/c. Results are given on total inclusive cross sections and theA dependence, as well as on distributions in Feynman-xF, rapidityy and transverse momentum. Ratios ofKS0 and of Λ to π+ production are presented. The data are compared with predictions of the quark-parton model FRITIOF.

50 data tables match query

No description provided.

No description provided.

No description provided.

More…

Direct soft photon production in K+ p and pi+ p interactions at 250-GeV/c

The EHS/NA22 collaboration Botterweck, F. ; Chapkin, M.M. ; Charlet, M. ; et al.
Z.Phys.C 51 (1991) 541-548, 1991.
Inspire Record 323612 DOI 10.17182/hepdata.14936

Inclusive production of direct soft photons is studied inK+p andK+π interactions at 250 GeV/c. Total cross sections, Feynman-x and transverse momentum distributions of direct γ's are presented. The measured cross sections are several times larger than expected from QED inner bremsstrahlung, indicating the presence of an anomalous soft photon source. The model of Lichard and Van Hove, based on the “cold quark-gluon plasma” picture, agrees with the data.

5 data tables match query

Results extrapolated below p(gamma) = m(pi0)/2.

No description provided.

No description provided.

More…

Rapidity and transverse momentum structure in pi+ and K+ collisions with Al and Au nuclei at 250-GeV/c

The EHS/NA22 collaboration Agababyan, N.M. ; Ajinenko, I.V. ; Belokopytov, Yu. A. ; et al.
Z.Phys.C 50 (1991) 361-372, 1991.
Inspire Record 302020 DOI 10.17182/hepdata.14979

An analysis is presented of the rapidity and transverse momentum distributions and of the nuclear stopping power in collisions ofπ+ andK+ mesons with Al and Au nuclei at 250 GeV/c. The experimental results are compared to predictions of the additive quark model and the dual parton model. The AQM offers an overall consistent description of the data in this experiment. The DPM reproduces reasonably well the rapidity spectra in the central and projectile fragmentation regions, but fails to describe the nuclear stopping power.

14 data tables match query

No description provided.

Excluding protons of PLAB < 1.2 GeV.

No description provided.

More…

A Study of double pomeron exchange in pi+ p and K+ p interactions at 250-GeV/c

The EHS/NA22 collaboration Atayan, M.R. ; Ajinenko, I.V. ; Belokopytov, Yu. A. ; et al.
Z.Phys.C 50 (1991) 353-360, 1991.
Inspire Record 29411 DOI 10.17182/hepdata.14985

Quasi-elastic scattering with central dipion cluster production is studied in π+p andK+p interactions at 250 GeV/c. The cross section of double pomeron exchange is obtained as σDPE(π+p →π+(π+π−)p)=24 ±5 µb and σDPE(K+p→K+(π+π−)p)=19 ±5 µb. The low energy pomeron-pomeron cross section is estimated for the first time.

6 data tables match query

Numerical values supplied by W. Kittel.

Numerical values supplied by W. Kittel.

Numerical values supplied by W. Kittel.

More…

Factorial moments and correlations in meson - nucleus interactions at 250-GeV/c

The EHS/NA22 collaboration Botterweck, F. ; Charlet, M. ; Chliapnikov, P.V. ; et al.
Z.Phys.C 51 (1991) 37-48, 1991.
Inspire Record 302022 DOI 10.17182/hepdata.40466

A sample of 8000 interactions of 250 GeV/c π+ andK+ mesons on Al and Au nuclei, is used to search for intermittency effects by calculating the normalized factorial moments of order two to four. No significant effect is observed in the higher moments. Two-body rapidity correlations and Bose-Einstein correlations in these interactions are presented.

1 data table match query

No description provided.