Ito, A.
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The Quantum Numbers and Decay Widths of the psi-prime (3684)

Luth, V. ; Boyarski, A. ; Lynch, H.L. ; et al.
Phys.Rev.Lett. 35 (1975) 1124-1126, 1975.
Inspire Record 100636 DOI 10.17182/hepdata.21229

Cross sections for e+e−→hadrons, e+e−, and μ+μ− near 3684 MeV are presented. The ψ(3684) resonance is established as having the assignment JPC=1−−. The mass is 3684 ± 5 MeV. The partial width for decay to electrons is Γe=2.1±0.3 keV and the total width is Γ=228±56 keV.

1 data table
Table 1

No description provided.


Photoproduction of the psi (3100) Meson at 11-GeV

Gittelman, B. ; Hanson, K.M. ; Larson, D. ; et al.
Phys.Rev.Lett. 35 (1975) 1616, 1975.
Inspire Record 99727 DOI 10.17182/hepdata.21158

The photoproduction of the ψ(3100) meson from a beryllium target has been measured using an 11.8-GeV bremsstrahlung beam. The energy and angular dependence of the measured spectra may be obtained from an elastic nucleon cross section of the form dσdt=(1.01±0.20)exp[(1.25±0.20)t] nb/GeV2. This cross section is exceedingly small in comparison with those of the other vector mesons.

1 data table
Table 1

ELECTRON PAIR PRODUCTION FROM BERYLLIUM TARGET. ELASTIC CROSS SECTION VALUE ALLOWS FOR SYSTEMATIC UNCERTAINTIES AND POSSIBLE INELASTIC CONTRIBUTIONS. -TMIN = 0.41 GEV**2.


Evidence for anomalous lepton production in e+ e- annihilation.

Perl, Martin L. ; Abrams, G.S. ; Boyarski, A. ; et al.
Phys.Rev.Lett. 35 (1975) 1489-1492, 1975.
Inspire Record 100634 DOI 10.17182/hepdata.21164

We have found events of the form e++e−→e±+μ∓+missingenergy, in which no other charged particles or photons are detected. Most of these events are detected at or above a center-of-mass energy of 4 GeV. The missing-energy and missing-momentum spectra require that at least two additional particles be produced in each event. We have no conventional explanation for these events.

1 data table
Table 1

X IN RE INCLUDES TWO OR MORE UNDETECTED PARTICLES.


Production Spectra of pi+-, K+-, rho+- at Large Angles in Proton Proton Collisions in the CERN Intersecting Storage Rings

The British-Scandinavian collaboration Alper, B. ; Böggild, H. ; Booth, P. ; et al.
Nucl.Phys.B 100 (1975) 237-290, 1975.
Inspire Record 99735 DOI 10.17182/hepdata.8506

Results are given on the inclusive production of charged pions, kaons, and nucleons, in proton-proton collisions at c.m. energies from √ s = 23 to 63 GeV at large angles and for the transverse momentum range 0.1 < p T < 4.8 GeV/ c . The dependence of the production spectra on the collision energy √ s , the transverse momentum p T , and the longitudinal rapidity is discussed.

168 data tables
Table 1

Axis error includes +- 15.0/15.0 contribution (NORMALIZATION ERROR - THE LARGEST SYSTEMATICS).

Table 2

Axis error includes +- 15.0/15.0 contribution (NORMALIZATION ERROR - THE LARGEST SYSTEMATICS).

Table 3

Axis error includes +- 15.0/15.0 contribution (NORMALIZATION ERROR - THE LARGEST SYSTEMATICS).

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K0(L) p --> K0(s) p Scattering in the 1.5-GeV-2.3-GeV Energy Region

Alexander, G. ; Bar-Nir, I. ; Benary, O. ; et al.
Phys.Lett.B 58 (1975) 484-488, 1975.
Inspire Record 2246 DOI 10.17182/hepdata.27761

The K L o p → K S o p differential and total cross-section and the forward scattering amplitude phase φ have been measured in the 1.5 to 2.3 GeV centre of mass energy range. The data is compared with predictions based on recent K ± N phase shift solutions. Best agreement is found for K + N solutions which do not warrant an I=0 P 1 2 exotic Z ∗ o (1800) baryon.

2 data tables
Table 1

No description provided.

Table 2

No description provided.


Search for Narrow Resonances in e+ e- Annihilation Into Hadrons at ADONE

Bartoli, B. ; Bisello, D. ; Esposito, B. ; et al.
Phys.Lett.B 58 (1975) 478-480, 1975.
Inspire Record 100116 DOI 10.17182/hepdata.27782

A search for narrow resonances in the reaction e + e − → hadrons in the mass regions 1915–2345 MeV and 2970–3090 MeV has been perforned at ADONE, the Frascati storage ring. With 90% confidence level our data exclude the production of narrow resonances with integrated cross section larger than 20% of the integrated cross section for production of the J/Ψ (3100 MeV).

1 data table
Table 1

No description provided.


Inclusive K*- (890) and anti-K*0 (890) Production in 14.3-GeV/c K- p Interactions

Paler, K. ; Tovey, S.N. ; Shah, T.P. ; et al.
Nucl.Phys.B 96 (1975) 1-28, 1975.
Inspire Record 2239 DOI 10.17182/hepdata.31901

Results on the inclusive reactions K − p → K ∗− (890) + X + and K − p → K ∗0 (890) + X 0 at 14.3 GeV/c are presented. A comparison is made with previous data and with the reaction K − p → K 0 + X at 14.3 GeV /c . Predictions of a triple-Regge model for the variation of the unnatural and natural parity exchanges with the mass of the X system are examined. The experimental values of the structure functions are compared with those calculated from a quark model.

30 data tables
Table 1

No description provided.

Table 2

No description provided.

Table 3

No description provided.

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Partial-wave analyses of the (3π)-system in the reaction π − p → π − π − π + p at 11.2 GeV/ c

The Bologna-Florence-Genoa-Milan-Oxford-Pavia collaboration Thompson, G. ; Antich, P. ; Boldetti, A. ; et al.
Nucl.Phys.B 101 (1975) 285-303, 1975.
Inspire Record 2860 DOI 10.17182/hepdata.36138

The results are presented of two partial-wave analyses of the (3π) − system in 30 000 events of the reaction π − p → π − π − π + p at 11.2 GeV/ c . Both techniques incorporate the assumptions of the isobar model and are (a) the University of Illinois program which fits in terms of the (3π) density matrix elements and (b) an amplitude parametrisaton including possible effects of both spin non-flip and spin flip at the baryon vertex. The results obtained with these independent programs are found to be very close.

2 data tables
Table 1

NORMALIZED TO A TOTAL REACTION CROSS SECTION OF 1.17 +- 0.24 MB. ALL QUOTED CROSS SECTIONS ARE FOR INTEGRATED BREIT-WIGNERS.

Table 2

A2 2+D-WAVE FOR 1.2 < M(3PI) < 1.4 GEV. THE FIRST THREE COMBINATIONS OF DENSITY MATRIX ELEMENTS ARE FOR NATURAL PARITY EXCHANGE, AND THE REMAINDER UNNATURAL.


Measurement of Differential Cross-Sections for Radiative Pion-Proton Capture in the Second Resonance Region

Weiss, A.J. ; Blasberg, D.J. ; Comiso, J.C. ; et al.
Nucl.Phys.B 101 (1975) 1-18, 1975.
Inspire Record 2234 DOI 10.17182/hepdata.36075

Differential cross-section measurements for π − p → γ n, consisting of three angular distributions at 618, 676 and 718 MeV/ c , and the energy dependence at θ γ = 90° for seven incident pion momenta between 502 and 888 MeV/ c , are presented. Our data qualitatively support recent multipole analyses. Agreement with the Scheffler et al. results for the inverse reaction, γ n → π − p, using a ( π − -recoil p) coincidence technique is good excluding a large violation of time reversal invariance. The agreement with γ n → π − p data obtained using the R ( π − / π + ) ratio technique or a deuterium bubble chamber is only qualitative.

7 data tables
Table 1

Axis error includes +- 6.6/6.6 contribution.

Table 2

Axis error includes +- 6.2/6.2 contribution.

Table 3

Axis error includes +- 6.0/6.0 contribution.

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Measurement of the Real Part of the Proton Proton Forward Scattering Amplitude from 80-GeV to 286-GeV by Means of Silicon Position Sensitive Detectors

Bartenev, V. ; Carrigan, Richard A. ; Cool, R.L. ; et al.
Sov.J.Nucl.Phys. 23 (1976) 400, 1976.
Inspire Record 100255 DOI 10.17182/hepdata.19082

None

1 data table
Table 1

THE ERRORS INCLUDE THE UNCERTAINTIES IN THE FIT PARAMETERS SLOPE AND SIG, WHILE THE PURELY STATISTICAL ERRORS ARE ALSO GIVEN.