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Hadron Production by $e^+ e^-$ Annihilation at Center-of-mass Energies Between 2.6-{GeV} and 7.8-{GeV}. Part 2. Jet Structure and Related Inclusive Distributions

Hanson, G. ; Alam, M.S. ; Boyarski, A. ; et al.

Phys.Rev.D 26 (1982) 991, 1982.

Inspire Record 170499 DOI 10.17182/hepdata.38162

We present results on the jet structure observed in multihadronic events produced by e+e− annihilation in the Mark I magnetic detector at SPEAR. The evidence for jet structure and the jet-axis angular distribution are reported. We give inclusive distributions of the hadrons in Feynman x, rapidity, and transverse momentum relative to the jet axis.

19 data tables

Table 1

Observed particle PT with respect to jet axis for events with three or more detected charged particles.

Table 2

No description provided.

Table 3

No description provided.

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Amplitude Analysis of the K0(s) K0(s) System Produced in the Reaction pi- p ---> K0(s) K0(s) n at 23-GeV/c

Etkin, A. ; Foley, K.J. ; Longacre, R.S. ; et al.

Phys.Rev.D 25 (1982) 1786, 1982.

Inspire Record 169729 DOI 10.17182/hepdata.24030

We have carried out an amplitude analysis of the KS0KS0 system produced in the reaction π−p→KS0KS0n at 23 GeV/c, based on about 15 000 events in the low-t region (|t−tmin|<0.1 GeV2). Below 1.6 GeV/c2, our favored solution is very similar to those from previous analyses. For higher masses, we observe the KS0KS0 decay of the h(2040) meson. In addition, the l=0 partial wave contains a new state, strongly coupled to KS0KS0, with parameters M=1.771−0.053+0.077 GeV/c2 and Γ=0.200−0.009+0.156 GeV/c2. Since this state is most probably I=0, we call it the S*′(1770). We find an f′f production ratio of 0.23−0.13+0.14, and branching ratios for f-meson and h(2040)-meson decays into KK¯ of (3.1−1.7+0.7)% and (0.67−0.15+0.41)%, respectively. We find, in a detailed comparison of our results with those from other experiments, that our solution is compatible with all known features of both charged and neutral KK¯ systems.

1 data table

Table 1

No description provided.

rivet Analysis
Hadron Production by e+ e- Annihilation at Center-Of-Mass Energies Between 2.6 GeV and 7.8 GeV: Part 1. Total Cross-Section, Multiplicities and Inclusive Momentum Distributions

Siegrist, J. ; Schwitters, R. ; Alam, M.S. ; et al.

Phys.Rev.D 26 (1982) 969, 1982.

Inspire Record 169326 DOI 10.17182/hepdata.23889

Measurements of multihadron production in e+e− annihilation at center-of-mass energies between 2.6 and 7.8 GeV are presented. Aside from the narrow resonances ψ(3095) and ψ(3684), the total hadronic cross section is found to be approximately 2.7 times the cross section for the production of muon pairs at c.m. energies below 3.7 GeV and 4.3 times the muon-pair cross section at c.m. energies above 5.5 GeV. Complicated structure is found at intermediate energies. Charged-particle multiplicities and inclusive momentum distributions are presented.

7 data tables

Table 1

ERRORS ARE STATISTICAL ONLY.

Table 2

ERRORS INCLUDE SYSTEMATICS.

Table 3

R WITH SMALLER BINNING AROUND RESONANCE REGION. ERRORS ARE STATISTICAL ONLY.

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QUASIELASTIC NEUTRINO AND ANTI-NEUTRINOS INTERACTION AT THE SERPUKHOV ACCELERATOR

The Serpukhov-Moscow collaboration Belikov, S.V. ; Belokopytov, Yu.A. ; Bugorsky, A.P. ; et al.

IFVE-81-146, 1981.

Inspire Record 169077 DOI 10.17182/hepdata.41330

None

4 data tables

Table 1

Axis error includes +- 10/10 contribution.

Table 2

Axis error includes +- 10/10 contribution.

Table 3

Axis error includes +- 10/10 contribution.

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RESONANCE PRODUCTION BY TWO PHOTON INTERACTIONS AT SPEAR

Jenni, P. ; Burke, D.L. ; Telnov, Valery I. ; et al.

Phys.Rev.D 27 (1983) 1031, 1983.

Inspire Record 173430 DOI 10.17182/hepdata.23843

Two-photon interactions have been studied with the SLAC-LBL Mark II magnetic detector at SPEAR. The cross section for η′ production by the reaction e+e−→e+e−η′ has been measured at beam energies from 2.0 to 3.7 GeV. The radiative width Γγγ(η′) has been determined to be 5.8±1.1 keV (±20% systematic uncertainty). Upper limits on the radiative widths of the f(1270), A2(1310), and f′(1515) tensor mesons have been determined. A search has been made for production of the E(1420) by γγ collisions, but no signal is observed.

2 data tables

Table 1

No description provided.

Table 2

NO SIGNAL ABOVE BACKGROUND SEEN. UPPER LIMITS AT 95 PCT CL GIVEN.

Pion Pair Production in Photon - Photon Collisions at {SPEAR}

Roussarie, A. ; Burke, D.L. ; Abrams, G.S. ; et al.

Phys.Lett.B 105 (1981) 304-308, 1981.

Inspire Record 166578 DOI 10.17182/hepdata.31056

We report a measurement of the cross section for the process γγ → π + π − at invariant masses 500 MeV/ c 2 < m ππ <2000 MeV/ c 2 . A value for the radiative width of the f(1270) tensor meson Γ f→ γγ = 3.6 ± 0.3 ± 0.5 KeV (helicity λ = 2) has been obtained from a fit to the observed ππ mass spectrum.

1 data table

Table 1

DATA REQUESTED FROM AUTHORS.

A-DEPENDENCE OF THE YIELD OF DEUTERON INCLUSIVE PHOTOPRODUCTION ON NUCLEI

Alanakian, K.V. ; Amarian, M.D. ; Demirchyan, R.A. ; et al.

EFI-490-33-81-YEREVAN, 1981.

Inspire Record 168420 DOI 10.17182/hepdata.18467

None

4 data tables

Table 1

No description provided.

Table 2

No description provided.

Table 3

No description provided.

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QUASIELASTIC muon-neutrino n SCATTERING AT 3-GeV TO 30-GeV ENERGY

Belikov, S.V. ; Bugorsky, A.P. ; Epshtein, V.Sh. ; et al.

Yad.Fiz. 35 (1982) 59, 1982.

Inspire Record 166061 DOI 10.17182/hepdata.41296

None

1 data table

Table 1

Statistical errors only.

MECHANISM OF RESONANCE PRODUCTION IN FOUR PARTICLE EXCLUSIVE CHANNELS IN K- p INTERACTIONS AT 32-GeV/c

Bogolyubsky, M.Yu. ; Kotova, A.I. ; Levitsky, M.S. ; et al.

Yad.Fiz. 34 (1981) 1251, 1981.

Inspire Record 165498 DOI 10.17182/hepdata.41299

None

14 data tables

Table 1

CS FOR GIVEN REACTIONS BASED ON THE SAME STATISTICS FROM THE SAME EXPERIMENT ARE ALSO PRESENTED IN THE PAPER A.GIVERNAUD ET AL.,NP B160, 445, 1979, BUT NUMBERS ARE DIFFERENT DUE TO DIFFERENT CORRECTIONS FOR SLOW PROTONS.

Table 2

No description provided.

Table 3

No description provided.