HEPData Search

Invariant inclusive cross-sections for π+-mesons and protons from\(\bar pp\) reactions at 22.4 GeV/c are presented. The average multiplicity for the production of π+-mesons is 1.92±0.02 and for protons 0.41±0.02. Annihilation spectra have been approximated by using the difference between\(\bar pp\) and pp data. The resulting distributions have similar gross features as the total\(\bar pp\) data.

1 data table

Table 1

No description provided.

Cross-Section Asymmetry of eta Mesons Photoproduction by Polarized Photons in the Resonance Region

Abramian, L.O. ; Avakian, R.O. ; Aganyants, Aleksandr O. ; et al.

Pisma Zh.Eksp.Teor.Fiz. 25 (1977) 597-600, 1977.

Inspire Record 124683 DOI 10.17182/hepdata.39787

None

1 data table

Table 1

No description provided.

Upper limit on parity nonconserving optical rotation in atomic bismuth

Lewis, L.L. ; Hollister, J.H. ; Soreide, D.C. ; et al.

Phys.Rev.Lett. 39 (1977) 795-798, 1977.

Inspire Record 128258 DOI 10.17182/hepdata.20948

We have searched for optical rotation near the 8757-Å magnetic-dipole absorption line in atomic bismuth vapor. The experiment is sensitive to parity nonconservation in the weak neutral-current interaction between electrons and nucleons in atoms. We find R≡Im(E1M1)=(−0.7±3.2)×10−8, which is considerably smaller than the value R=−2.5×10−7 obtained by central-field calculations for this bismuth line using the Weinberg-Salam theory of neutral currents.

1 data table

Table 1

No description provided.

Single Particle Inclusive Spectra of Charged Particles in anti-p p Interactions at 22.4-GeV/c

The Alma Ata-Dubna-Helsinki-Kosice-Moscow-Prague collaboration Boos, E.G. ; Samoilov, V.V. ; Takibaev, Zh.S. ; et al.

Nucl.Phys.B 121 (1977) 381-392, 1977.

Inspire Record 109633 DOI 10.17182/hepdata.35465

The inclusive spectra for p p collisions at 22.4 GeV/ c are investigated. We show that the transverse momentum distributions resemble those in high-energy pp interactions and discuss the influence of annihilation processes on the p T 2 distributions. The invariant inclusive cross section for pions in the central region is found to be 28 ± 1 mb. A charge asymmetry is indicated by the y ∗ spectrum in the central region, the asymmetry parameter having the value 0.15 ± 0.01. Finally, we estimate the upper limit of the diffraction dissociation of the beam particle to be 3.68 −0.15 +0.45 mb.

10 data tables

Table 1

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Search for Parity Nonconservation in Atomic Bismuth

Soreide, D.C. ; Roberts, D.E. ; Lindahl, E.G. ; et al.

Phys.Rev.Lett. 36 (1976) 352-355, 1976.

Inspire Record 112866 DOI 10.17182/hepdata.21089

In a search for optical rotation near the 8755-Å magnetic-dipole absorption line in atomic Bi, our first results set an upper limit F<10−6 on a parity nonconserving amplitude associated with the line. This limit improves upon earlier parity tests in atoms by three orders of magnitude. Further improvement of at least another order of magnitude appears possible by this method which should then provide an exacting test of parity conservation in the neutral weak-current interaction in atoms.

1 data table

Table 1

No description provided.

Inclusive and Semiinclusive Two Pion Correlations in p p Collisions at 69-GeV/c

The French-Soviet collaboration Derre, J. ; Jabiol, M.A. ; Otwinowski, S. ; et al.

Nuovo Cim.A 33 (1976) 721, 1976.

Inspire Record 99995 DOI 10.17182/hepdata.8917

Correlations between pions produced in pp collisions at 69 GeV/c are observed both for π−π+ and π−π−. Short-range correlations in rapidity are present fory1⋍y2 in both cases; an enhancement is seen aroundy1=y2=±1. Correlations between transverse variables are linked to those in rapidity for π−π− combinations, whereas the effect is essentially kinematical for π+π−.

44 data tables

Table 1

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Table 2

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Table 3

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