Date

Cmenergies

Version 2
Elastic Photoproduction of omega Mesons from Hydrogen, Deuterium, and Complex Nuclei

Abramson, J. ; Andrews, D.E. ; Harvey, John R. ; et al.
Phys.Rev.Lett. 36 (1976) 1428, 1976.
Inspire Record 108496 DOI 10.17182/hepdata.21101
6 data tables

No description provided.

FORWARD CROSS SECTION IS 366 +- 49 MUB/GEV**2 AND SLOPE IS 47.1 +- 8.0 GEV**-2.

FORWARD CROSS SECTION IS 9.56 +- 1.24 MB/GEV**2 AND SLOPE IS 160 +- 23 GEV**-2.

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Strangeness Exchange in the Photoproduction of $K^+ \Lambda$ (1520) Between 2.8-{GeV} and 4.8-{GeV}

Barber, D.P. ; Dainton, J.B. ; Lee, L.C.Y. ; et al.
Z.Phys. C7 (1980) 17, 1980.
Inspire Record 153887 DOI 10.17182/hepdata.14096
3 data tables

FITTED CROSS SECTION ENERGY DEPENDENCE IS SIG = (6.7 +- 0.7 MUB*GEV**2) * P**(-2.1 +- 0.2), INCLUDING HIGHER ENERGY DATA.

EXPONENTIAL SLOPE IS 6.1 +- 2.0 GEV**-2 FOR -T = 0.2 TO 0.7 GEV**2.

No description provided.


The pi+ p interaction at 1.2 gev/c

Berthon, A. ; Mas, J. ; Narjoux, J.L. ; et al.
Nucl.Phys. B81 (1974) 431-444, 1974.
Inspire Record 93412 DOI 10.17182/hepdata.7945
7 data tables

No description provided.

LEGENDRE POLYNOMIAL FIT USED TO CORRECT FOR ELASTIC EVENTS LOST FROM THE FORWARD BIN.

No description provided.

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Study of the Reactions $\pi^- p \to K^0 \Sigma^0(1385)$ and $\pi^- p \to K^+ \Sigma^-(1385)$ at 3.95-{GeV}/$c$

The CERN-College de France-Madrid-Stockholm collaboration Aguilar-Benitez, M. ; Albajar, M.C. ; Ferrando, A. ; et al.
Z.Phys. C6 (1980) 109-123, 1980.
Inspire Record 153921 DOI 10.17182/hepdata.14369
16 data tables

FROM THE CHANNEL PI- P --> LAMBDA K0 PI0 WHICH HAS A CROSS SECTION OF 72 +- 4 MUB.

FROM THE CHANNEL PI- P --> LAMBDA K+ PI- WHICH HAS A CROSS SECTION OF 79 +- 3 MUB.

FORWARD CROSS SECTION.

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Study of the reaction k+ p ---> k*0(890) delta++ from 4.6-16.0 gev/c

Ciapetti, G. ; Eisner, R.L. ; Irving, A.C. ; et al.
Nucl.Phys. B64 (1973) 58-108, 1973.
Inspire Record 94946 DOI 10.17182/hepdata.6741
20 data tables

No description provided.

No description provided.

No description provided.

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K+ p Interactions Near 3-GeV/c. 2. Baryon Resonance Production

Musgrave, B. ; Peeters, P. ; Schreiner, P. ; et al.
Nucl.Phys. B87 (1975) 365-398, 1975.
Inspire Record 1720 DOI 10.17182/hepdata.1112
7 data tables

No description provided.

No description provided.

No description provided.

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Study of the Reaction $p p$ (Polarized) $\to p \pi^+ n$ With Polarized Beam From 3-{GeV}/$c$ to 12-{GeV}/$c$

Wicklund, A.B. ; Arenton, M.W. ; Ayres, D.S. ; et al.
Phys.Rev. D34 (1986) 19, 1986.
Inspire Record 17565 DOI 10.17182/hepdata.3936
36 data tables

Unpolarized cross sections.

Unpolarized cross sections.

Unpolarized cross sections.

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Photoproduction of $\pi \Delta(1232)$ From Hydrogen in the Energy Range 2.4-{GeV} to 4.8-{GeV}

The LAMP2 Group collaboration Barber, D.P. ; Dainton, J.B. ; Lee, L.C.Y. ; et al.
Z.Phys. C6 (1980) 93, 1980.
Inspire Record 153944 DOI 10.17182/hepdata.14328
5 data tables

DIFFERENTIAL CROSS SECTION AVERAGED OVER WHOLE ENERGY RANGE.

DIFFERENTIAL CROSS SECTION AVERAGED OVER WHOLE ENERGY RANGE.

DIFFERENTIAL CROSS SECTION FOR DIFFERENT ENERGY RANGES.

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Evidence for vector meson exchange in $\rho^-$ production at 8 GeV/c

Derado, I. ; Poirier, J.A. ; Biswas, N.N. ; et al.
Phys.Lett. B24 (1967) 112-114, 1967.
Inspire Record 1389618 DOI 10.17182/hepdata.29606

We have studied ϱ − production at 8 GeV / c . The data cannot be explained by one-pion-exchange with absorption and we conclude that vector exchange contributes. This contrasts with ϱ o production at this energy and ϱ − production at lower energy.

1 data table

No description provided.


Evidence for rho production in $K^- d$ interaction at 2.24 GeV/c

Alyea, E.D. ; Crittenden, R.R. ; Martin, H.J. ; et al.
Phys.Lett. 15 (1965) 82-83, 1965.
Inspire Record 1389634 DOI 10.17182/hepdata.30445
1 data table

No description provided.


Photoproduction of Meson and Baryon Resonances at Energies up to 5.8 GEV

The Aachen-Berlin-Bonn-Hamburg-Heidelberg-Munich collaboration
Phys.Rev. 175 (1968) 1669-1696, 1968.
Inspire Record 52787 DOI 10.17182/hepdata.47064
4 data tables
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Study of the reaction pi- p --> omega n at 3, 8, 6 and 8 GeV/c

Apel, W.D. ; Ausländer, J. ; Müller, H. ; et al.
Phys.Lett. B55 (1975) 111-116, 1975.
Inspire Record 1388800 DOI 10.17182/hepdata.27881

Results are given for the production differential cross sections and the ω decay angular distribution in terms of the ω spin density matrix elements.

3 data tables

PAPER ALSO GIVES OFF-DIAGONAL ELEMENTS OF THE ERROR COVARIANCE MATRIX.

PAPER ALSO GIVES OFF-DIAGONAL ELEMENTS OF THE ERROR COVARIANCE MATRIX.

No description provided.


Spin alignment and violation of the OZI rule in exclusive $\omega$ and $\phi$ production in pp collisions

The COMPASS collaboration Adolph, C. ; Akhunzyanov, R. ; Alexeev, M.G. ; et al.
Nucl.Phys. B886 (2014) 1078-1101, 2014.
Inspire Record 1298025 DOI 10.17182/hepdata.64185
5 data tables

Differential cross section ratio R(PHI/OMEGA) and corresponding OZI violation factors F(OZI). R(PHI/OMEGA) is multiplied by 100 to improve readability.

Differential cross section ratio R(PHI/OMEGA) and corresponding OZI violation factors F(OZI) for different cuts on the vector meson momentum P(V). R(PHI/OMEGA) is multiplied by 100 to improve readability.

Spin alignment RHO(00) extracted from the helicity angle distributions for PHI and OMEGA production, in the latter case with various cuts on P(V). The uncertainty is the propagated uncertainty from the linear fits, which in turn includes the quadratic sum of statistical uncertainties and uncertainties from the background subtraction.

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Inclusive Production of Strangeness $S = \pm 1$ Vector and Tensor Resonances on $K^- P$ Interactions at 32-{GeV}/$c$

The French-Soviet CERN-Soviet collaborations Arestov, Yu. ; Borovikov, A. ; Kozlovsky, E. ; et al.
Z.Phys. C6 (1980) 101-108, 1980.
Inspire Record 154719 DOI 10.17182/hepdata.11053
11 data tables

No description provided.

No description provided.

No description provided.

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s CHANNEL AND t CHANNEL HELICITY CONSERVATION IN DIFFRACTIVE EVENTS OF THE REACTION K+ p ---> K+ pi+ pi- p AT 32-GeV/c

The CERN-Soviet collaboration Azhinenko, I.V. ; Barth, M. ; Belokopytov, Yu.A. ; et al.
Sov.J.Nucl.Phys. 32 (1980) 673, 1980.
Inspire Record 146409 DOI 10.17182/hepdata.41499
25 data tables

DD IVENTS SELECTED BY THE RAPIDITY GAP METHOD.

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Reaction $\pi^- p \to \omega n$ in the 15-{GeV}/$c$ - 40-{GeV}/$c$ Momentum Range

The Serpukhov-CERN collaboration Apel, W.D. ; Augenstein, K.H. ; Bertolucci, E. ; et al.
Lett.Nuovo Cim. 25 (1979) 493, 1979.
Inspire Record 142561 DOI 10.17182/hepdata.37383
7 data tables

DATA OBTAINED IN ASSUMPTION THAT RHO(MM=00,P=3,XYZ=SH)=1-2*RHO(MM=1-1,P=3,XYZ=SH).

INTEGRATED CROSS SECTION, INCLUDING SYSTEMATIC UNCERTAINTY IN ERRORS Axis error includes +- 15/15 contribution (DECAY-BR(BRN=OMEGA --> PI0 GAMMA,BR=0.088 +- 0.005)).

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Reaction $\pi^- p \to \eta^\prime n$ in the 15-{GeV}/$c$ - 40-{GeV}/$c$ Momentum Range

The Serpukhov-CERN collaboration Apel, W.D. ; Augenstein, K.H. ; Bertolucci, E. ; et al.
Phys.Lett. B83 (1979) 131, 1979.
Inspire Record 141023 DOI 10.17182/hepdata.49657
8 data tables

AVERAGE RATIO IS 2.76 +- 0.07 PCT.

AVERAGE RATIO IS 0.52 +- 0.02.

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Photoproduction of pi+ pi- meson pairs on the proton

The CLAS collaboration Battaglieri, M. ; De Vita, R. ; Szczepaniak, A.P. ; et al.
Phys.Rev. D80 (2009) 072005, 2009.
Inspire Record 825040 DOI 10.17182/hepdata.74824

The exclusive reaction $\gamma p \to p \pi^+ \pi^-$ was studied in the photon energy range 3.0 - 3.8 GeV and momentum transfer range $0.4<-t<1.0$ GeV$^2$. Data were collected with the CLAS detector at the Thomas Jefferson National Accelerator Facility. In this kinematic range the integrated luminosity was about 20 pb$^{-1}$. The reaction was isolated by detecting the $\pi^+$ and proton in CLAS, and reconstructing the $\pi^-$ via the missing-mass technique. Moments of the di-pion decay angular distributions were derived from the experimental data. Differential cross sections for the $S$, $P$, and $D$-waves in the $M_{\pi^+\pi^-}$ mass range $0.4-1.4$ GeV were derived performing a partial wave expansion of the extracted moments. Besides the dominant contribution of the $\rho(770)$ meson in the $P$-wave, evidence for the $f_0(980)$ and the $f_2(1270)$ mesons was found in the $S$ and $D$-waves, respectively. The differential production cross sections $d\sigma/dt$ for individual waves in the mass range of the above-mentioned mesons were extracted. This is the first time the $f_0(980)$ has been measured in a photoproduction experiment.

198 data tables

Moments YLM(LM=00) of the di-pion angular distribution for -T.

Moments YLM(LM=00) of the di-pion angular distribution for -T.

Moments YLM(LM=00) of the di-pion angular distribution for -T.

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Measurement of Spin-Density Matrix Elements for $\phi$-Meson Photoproduction from Protons and Deuterons Near Threshold

The LEPS collaboration Chang, W.C. ; Ahn, D.S. ; Ahn, J.K. ; et al.
Phys.Rev. C82 (2010) 015205, 2010.
Inspire Record 859164 DOI 10.17182/hepdata.55768

The LEPS/SPring-8 experiment made a comprehensive measurement of the spin-density matrix elements for $\gamma p \to \phi p$, $\gamma d \to \phi p n$ and $\gamma d \to \phi d$ at forward production angles. A linearly polarized photon beam at $E_{\gamma}$=1.6-2.4 GeV was used for the production of $\phi$ mesons. The natural-parity Pomeron exchange processes remains dominant nearthreshold. The unnatural-parity processes of pseudoscalar exchange is visible in the production from nucleons but is greatly reduced in the coherent production from deuterons. There is no strong $E_{\gamma}$-dependence, but some dependence on momentum-transfer. A small but finite value of the spin-density matrix elements reflecting helicity-nonconserving amplitudes in the $t$-channel is observed.

81 data tables

Measurements of the spin density matrix element RHO(JJ=0,MM=00) for the GAMMA P --> PHI P reaction in the helicity system as a function of T-Tmin for 3 incident photon energy regions.

Measurements of the spin density matrix element RE(RHO(JJ=0,MM=10)) for the GAMMA P --> PHI P reaction in the helicity system as a function of T-Tmin for 3 incident photon energy regions.

Measurements of the spin density matrix element RHO(JJ=0,MM=1-1) for the GAMMA P --> PHI P reaction in the helicity system as a function of T-Tmin for 3 incident photon energy regions.

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Differential cross sections and spin density matrix elements for the reaction gamma p ---> p omega

The CLAS collaboration Williams, M. ; Applegate, D. ; Bellis, M. ; et al.
Phys.Rev. C80 (2009) 065208, 2009.
Inspire Record 829180 DOI 10.17182/hepdata.52667

High-statistics differential cross sections and spin density matrix elements for the reaction $\gamma p \to p \omega$ have been measured using the CLAS at Jefferson Lab for center-of-mass (CM) energies from threshold up to 2.84 GeV. Results are reported in 112 10-MeV wide CM energy bins, each subdivided into $\cos{\theta_{CM}^{\omega}}$ bins of width 0.1. These are the most precise and extensive $\omega$ photoproduction measurements to date. A number of prominent structures are clearly present in the data. Many of these have not previously been observed due to limited statistics in earlier measurements.

221 data tables

Differential cross section for the W range 1.72 to 1.73 GeV.

Differential cross section for the W range 1.73 to 1.74 GeV.

Differential cross section for the W range 1.74 to 1.75 GeV.