Kunori, S.
[2.0, 5.0]
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Target asymmetry for neutral pi meson photoproduction on polarized protons at 4 GeV in the forward direction

Bienlein, H. ; Braunschweig, W. ; Dinter, H. ; et al.
Phys.Lett.B 46 (1973) 131-134, 1973.
Inspire Record 84690 DOI 10.17182/hepdata.28065

The asymmetry A = (σ + −σ − ) (σ + +σ − ) of the reaction γ p↑↓ → π 0 p was measured at the Deutsches Elektronen Synchrotron DESY, Hamburg at a mean photon energy of 4.0 GeV in the four-momentum transfer range 0.2 (GeV/ c ) 2 ⩽ −t ⩽ 1.1 (GeV/ c ) 2 in steps of approximately 0.08 (GeV/ c ) 2 . The π 0 -meson and the proton were detected in coincidence. The asymmetry is compatible with zero in the t -range 0.2 (GeV/ c ) 2 ⩽ − t ⩽ 0.4 (GeV/ c ) 2 and negative in the t -range ⩾ 0.5 (GeV/ c ) 2 .

1 data table
Table 1

No description provided.


Study of the reaction pi+ n ---> omega p at 6.0 gev/c

Anderson, J.C. ; Engler, A. ; Kraemer, R.W. ; et al.
Phys.Lett.B 45 (1973) 165-168, 1973.
Inspire Record 84780 DOI 10.17182/hepdata.28073

An analysis of the reaction π + n→ ω p in a 6.0 GeV/ c bubble chamber experiment is presented. The production differential cross section and spin density matrix elements are compared with Regge exchange models.

3 data tables
Table 1

CORRECTED FOR BACKGROUND.

Table 2

HELICITY FRAME. T-DEPENDENT BACKGROUND SUBTRACTED.

Table 3

TRANSVERSITY FRAME. T-DEPENDENT BACKGROUND SUBTRACTED.


Polarization in pi+ p ---> k+ sigma+ backward scattering at 3.5 gev/c

Bradamante, F. ; Conetti, S. ; Daum, C. ; et al.
Phys.Lett.B 44 (1973) 202-206, 1973.
Inspire Record 84846 DOI 10.17182/hepdata.28109

In a counter and wire spark chamber experiment with a polarized target, backward kaons were detected, and the Σ + 's identified by a missing-mass technique. An average polarization of −0.08 ± 0.05 was found for −0.2 < u < 0.1 GeV 2 .

1 data table
Table 1

THE MEAN POLARIZATION FOR ALL EVENTS IS -0.08 +- 0.05.


Measurement of the spin rotation parameter r in proton proton elastic scattering at 6 and 16 gev/c

Deregel, J. ; Bystricky, J. ; Cozzika, G. ; et al.
Phys.Lett.B 43 (1973) 338-340, 1973.
Inspire Record 84912 DOI 10.17182/hepdata.28132

The spin rotation parameter R in elastic proton-proton scattering has been determined at incident momenta 6 and 16 GeV/ c in the interval from t = −0.18 (GeV/ c ) 2 to −0.54 (GeV/ c ) 2 . R pp at 16 GeV/ c is close to the val obtained for R in π − p elastic scattering at the same incident momentum. Equality of R pp ( s , t ) and R π p ( s , t ) is expected if Pomeron exchange dominates and if factorization holds. The t -dependence of R at 16 GeV/ c is consistent with weak helicity flip.

2 data tables
Table 1

No description provided.

Table 2

No description provided.


Electroproduction of rho0 mesons at 1.5 > q-squared > 0.3 gev-squared and 2.8 > w > 1.7 gev

Eckardt, V. ; Gebauer, H.J. ; Joos, P. ; et al.
Phys.Lett.B 43 (1973) 240-244, 1973.
Inspire Record 84944 DOI 10.17182/hepdata.28153

Production and decay characteristics of electroproduced rho mesons were studied in the final state epπ + π − .

1 data table
Table 1

No description provided.


The reaction k+ d ---> k0 p p at 4.6 gev/c

Dehm, G. ; Geist, Walter M. ; Goebel, G. ; et al.
Nucl.Phys.B 60 (1973) 493-504, 1973.
Inspire Record 83917 DOI 10.17182/hepdata.32493

In an experiment with the CERN 2m deuterium bubble chamber the reaction K + d→K o pp (1) and the related reaction K + n→K o p (2) are studied at an incident momentum of 4.6 GeV/ c . The cross section for the latter reaction is found to be slightly larger than the cross section for the reaction K − p → K o n at the same energy. The corresponding differential cross sections agree within the rather large uncertainties. The forward amplitude for reaction (2) is predominantly real. Moreover, the total and forward differential charge exchange cross section values are compatible with those predicted on the basis of an SU (3) sum rule. A comparison of the K ± -charge exchange differential cross sections with the predictions of a Regge pole model is also presented.

2 data tables
Table 1

No description provided.

Table 2

SMALL -T DEUTERIUM CORRECTION APPLIED USING MC GEE WAVE FUNCTION (PAPER ALSO GIVES UNCORRECTED AND HULTHEN CORRECTED DATA).


Properties of the inelastic k+ p reactions between 1.2 and 1.7 gev/c

Berthon, A. ; Montanet, L. ; Paul, E. ; et al.
Nucl.Phys.B 63 (1973) 54-92, 1973.
Inspire Record 83879 DOI 10.17182/hepdata.32479

The observation of 70 000 K 0 p π + events produced with K + incident momenta of 1.21, 1.29, 1.38 and 1.69 GeV/ c allows a detailed description of the production and decay of the Δ(1236) and K ∗ (892) resonances which dominate the K 0 p π + final state. No striking variations with energy are observed. The associated production of Δ and K ∗ near threshold shows striking similarities with the same production at higher energy.

22 data tables
Table 1

INCLUDING 1 PCT SYSTEMATIC ERROR ON CORRECTIONS.

Table 2

FIT 'A', ALLOWING FOR DELTA-K* INTERFERENCE (TWO OTHER FITS GIVEN IN PAPER).

Table 3

S-CHANNEL HELICITY FRAME.

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Backward pi- p elastic scattering at 3 and 4 gev/c

Brabson, A. ; Calvelli, G. ; Cittolin, S. ; et al.
Phys.Lett.B 42 (1972) 283-286, 1972.
Inspire Record 85009 DOI 10.17182/hepdata.28198

We have measured dσ du for π − p elastic scattering at 3 and 4 GeV c in the ranges −0.119⩽ u ⩽0.113 and −0.233⩽ u ⩽0.088, respectively. A fit of the form d σ /d u = A exp ( Bu + Cu 2 ) gives B = 4.34±0.42 and C = 7.0±3.5 at 4 GeV c with χ 2 = 5.7 for 9 degrees of freedom; the simpler form d σ /d u = A exp( Bu ) gives B = 3.7 ± 0.3 with χ 2 = 9.6. At 3 GeV c we confirm with high statistics the structures already observed.

2 data tables
Table 1

No description provided.

Table 2

No description provided.


A measurement of anti-p p ---> pi+ pi- and anti-p p ---> k- k+ for small values of t and u at 3 and 4 gev/c

Brabson, A. ; Calvelli, G. ; Cittolin, S. ; et al.
Phys.Lett.B 42 (1972) 287-290, 1972.
Inspire Record 85008 DOI 10.17182/hepdata.28189

We have measured with good statistics the differential cross section for p p →π + π − , K + K − around 0°. Our data and previous results show that the s -dependence of dσ/d t has a value compatible with the appropriate baryon exchange.

6 data tables
Table 1

No description provided.

Table 2

No description provided.

Table 3

No description provided.

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The reaction e+ e- ---> p anti-p at a total energy of 2.1 gev

Castellano, M. ; Di Giugno, G. ; Humphrey, J.W. ; et al.
Nuovo Cim.A 14 (1973) 1-20, 1973.
Inspire Record 87244 DOI 10.17182/hepdata.37782

An optical spark-chamber counter experiment at Adone, the Italian colliding electron-positron ring, has succeeded in measuring the cross-section for the process e+e−→p\(\bar p\) near threshold (Ec.m.=2.1 GeV). The result isσ(e+e−→p\(\bar p\))=(0.91±0.22) nb.

1 data table
Table 1

ISOTROPIC ANGULAR DISTRIBUTION ASSUMED.