HEPData Search

The total cross section of hadron photoproduction on C, Cu and Pb nuclei is measured for six energy values in the range 12–30 GeV. The obtained cross-section values for C and Cu nuclei have a weak energy dependence at high energies (above 20 GeV). The cross section for the Pb nucleus is somewhat higher in comparison with that expected, and energy dependence is not observed. The A -dependence of the effective number of hadrons agrees with VDM predictions.

2 data tables match query

Table 1

No description provided.

Table 2

A-EFFECTIVE/A = SIG(GAMMA A)/(Z*SIG(GAMMA P) + (A-Z)*SIG(GAMMA N)) WHERE SIG(GAMMA P) = (98.7 +- 3.6) + (65 +- 10)/SQRT(P) MUB, SIG(GAMMA N) = SIG(GAMMA P) - (18.3 +- 6.1)/SQRT(P) MUB AND A IS 12, 64 AND 207 FOR THESE NUCLEI.

MEASUREMENT OF TOTAL pi0 PHOTOPRODUCTION CROSS-SECTION ON THE NUCLEI Be-9, C-12, O-16 IN THE ENERGY RANGE E (gamma) = 0.25-GeV - 1-GeV WITHOUT CHARGED PARTICLES IN FINAL STATE

Arakelian, E.A. ; Bayatian, G.L. ; Grigorian, N.K. ; et al.

Sov.J.Nucl.Phys. 38 (1983) 886, 1983.

Inspire Record 184638 DOI 10.17182/hepdata.17672

None

2 data tables match query

Table 1

Axis error includes +- 0.0/0.0 contribution (?////NOT GIVEN).

Table 2

Axis error includes +- 0.0/0.0 contribution (?////NOT GIVEN).

Measurement of Total Hadronic Photoproduction Cross-section in $^{9}$Be, $^{12}$C, $^{16}$O, $^{64}$Cu Nuclei in the Photon Energy Range $e \gamma$ = (0.25-{GeV} - 2.7-{GeV})

Arakelian, E.A. ; Bayatian, G.L. ; Grigorian, N.K. ; et al.

Sov.J.Nucl.Phys. 38 (1983) 589, 1983.

Inspire Record 184631 DOI 10.17182/hepdata.17736

None

1 data table match query

Table 1

No description provided.

HADRONIC PHOTOABSORPTION AND THE COHERENT PHOTOPRODUCTION OF PI0 MESONS ON BE AND C NUCLEI IN THE RESONANCE ENERGY REGION. (IN RUSSIAN)

Ananikian, A.K. ; Arakelian, E.A. ; Bayatian, G.L. ; et al.

Yad.Fiz. 46 (1987) 401-403, 1987.

Inspire Record 255687 DOI 10.17182/hepdata.17423

None

2 data tables match query

Table 1

No description provided.

Table 2

No description provided.

TOTAL CROSS-SECTION OF PI0 MESON AND HADRON PHOTOPRODUCTION ON Be, C, O, AND Al NUCLEI IN THE ENERGY RANGE E (GAMMA) = 200-MEV - 900-MEV. (IN RUSSIAN)

Arakelian, E.A. ; Bayatian, G.L. ; Vartanian, G.S. ; et al.

Yad.Fiz. 42 (1985) 3-7, 1985.

Inspire Record 227726 DOI 10.17182/hepdata.17616

None

3 data tables match query

Table 1

No description provided.

Table 2

No description provided.

Table 3

No description provided.

Measurement of the Cross-section of Photofission and Electrofission of $^{235}$U and $^{238}$U in the Energy Range 1.33-{GeV} to 4.32-{GeV}

Arakelian, E.A. ; Bayatian, H.L. ; Grigorian, N.K. ; et al.

Sov.J.Nucl.Phys. 49 (1989) 780, 1989.

Inspire Record 271539 DOI 10.17182/hepdata.47251

None

1 data table match query

Table 1

No description provided.

Delta(phi) Delta(eta) correlations in central Au + Au collisions at s(NN)**(1/2) = 200-GeV.

The STAR collaboration Adams, J. ; Aggarwal, M.M. ; Ahammed, Z. ; et al.

Phys.Rev.C 75 (2007) 034901, 2007.

Inspire Record 721060 DOI 10.17182/hepdata.102086

We report charged-particle pair correlation analyses in the space of Delta -phi (azimuth) and Delta -eta (pseudo-rapidity), for central Au + Au collisions at sqrt{s_{NN}} = 200 GeV in the STAR detector. The analysis involves unlike-sign charge pairs and like-sign charge pairs, which are transformed into charge-dependent (CD) signals and charge-independent (CI) signals. We present detailed parameterizations of the data. A model featuring dense gluonic hot spots as first proposed by van Hove predicts that the observables under investigation would have sensitivity to such a substructure should it occur, and the model also motivates selection of transverse momenta in the range 0.8 < p_t < 2.0$ GeV/c. Both CD and CI correlations of high statistical significance are observed and possible interpretations are discussed.

16 data tables match query

Figure 1a (left panel)

FIG. 1: a) left side: The $\Delta\phi$ - $\Delta\eta$ correlation data for unlike-sign charge particle pairs from the Star central trigger dataset shown in a 2-dimensional (2-D) perspective plot. The particle tracks have 0.8 GeV/c < $p_t$ < 2.0 GeV/c and |$\eta$| < 1.0. The structure that looks like tiles on a roof is due to the readout boundary effects of the 12 sector TPC. b) right side: The similar correlation data for like-sign charge particle pairs is shown.

Figure 1b (right panel)

Figure 2a (left panel)

FIG. 2: a) left side: The correlation data for the ratio of the histograms of same-event-pairs to mixed-event-pairs for unlike-sign charged pairs, shown in a two-dimensional (2-D) perspective plot $\Delta\phi$ - $\Delta\eta$. The plot was normalized to a mean of 1. b) right side: The similar correlation data for like-sign charge pairs.

More…

Charged-to-neutral correlation at forward rapidity in Au+Au collisions at $\sqrt{s_{NN}}$=200 GeV

The STAR collaboration Adamczyk, L. ; Adkins, J.K. ; Agakishiev, G. ; et al.

Phys.Rev.C 91 (2015) 034905, 2015.

Inspire Record 1311834 DOI 10.17182/hepdata.73610

Event-by-event fluctuations of the ratio of inclusive charged to photon multiplicities at forward rapidity in Au+Au collision at $\sqrt{s_{NN}}$=200 GeV have been studied. Dominant contribution to such fluctuations is expected to come from correlated production of charged and neutral pions. We search for evidences of dynamical fluctuations of different physical origins. Observables constructed out of moments of multiplicities are used as measures of fluctuations. Mixed events and model calculations are used as baselines. Results are compared to the dynamical net-charge fluctuations measured in the same acceptance. A non-zero statistically significant signal of dynamical fluctuations is observed in excess to the model prediction when charged particles and photons are measured in the same acceptance. We find that, unlike dynamical net-charge fluctuation, charge-neutral fluctuation is not dominated by correlation due to particle decay. Results are compared to the expectations based on the generic production mechanism of pions due to isospin symmetry, for which no significant (<1%) deviation is observed.

21 data tables match query

Table 1

Multiplicity distributions of raw charged particles and photons.

Table 2

The $v_{dyn}$ and the three terms of $v_{dyn}$ vs $\sqrt{\langle N_{ch}\rangle \langle N_{\gamma}\rangle }$ for real events. $\omega_{ch}^{real}$ is plotted.

Table 3

The $v_{dyn}$ and the three terms of $v_{dyn}$ vs $\sqrt{\langle N_{ch}\rangle \langle N_{\gamma}\rangle }$ for mixed events. $\omega_{ch}^{mixed}$ is plotted.

More…

Date

Collaboration

Subject_areas

Phrases

Reactions

Observables

CM Energies (GeV)

Authors Reset

TOTAL CROSS-SECTION OF HADRON PHOTOPRODUCTION ON Be, C, H2O AND Al NUCLEI IN THE ENERGY RANGE E (gamma) = 200-MeV TO 900-MeV

TOTAL CROSS-SECTION OF pi0 MESON PHOTOPRODUCTION ON Be, C, O AND Al NUCLEI IN THE ENERGY RANGE E (gamma) = 180-MeV TO 650-MeV WITHOUT CHARGED PARTICLES IN FINAL STATE

Measurement of Total Cross-Sections of Hadron Photoproduction in C, Cu and Pb Nuclei at E(gamma) = 12-GeV to 30-GeV

MEASUREMENT OF TOTAL pi0 PHOTOPRODUCTION CROSS-SECTION ON THE NUCLEI Be-9, C-12, O-16 IN THE ENERGY RANGE E (gamma) = 0.25-GeV - 1-GeV WITHOUT CHARGED PARTICLES IN FINAL STATE

Measurement of Total Hadronic Photoproduction Cross-section in $^{9}$Be, $^{12}$C, $^{16}$O, $^{64}$Cu Nuclei in the Photon Energy Range $e \gamma$ = (0.25-{GeV} - 2.7-{GeV})

HADRONIC PHOTOABSORPTION AND THE COHERENT PHOTOPRODUCTION OF PI0 MESONS ON BE AND C NUCLEI IN THE RESONANCE ENERGY REGION. (IN RUSSIAN)

TOTAL CROSS-SECTION OF PI0 MESON AND HADRON PHOTOPRODUCTION ON Be, C, O, AND Al NUCLEI IN THE ENERGY RANGE E (GAMMA) = 200-MEV - 900-MEV. (IN RUSSIAN)

Measurement of the Cross-section of Photofission and Electrofission of $^{235}$U and $^{238}$U in the Energy Range 1.33-{GeV} to 4.32-{GeV}

Delta(phi) Delta(eta) correlations in central Au + Au collisions at s(NN)**(1/2) = 200-GeV.

Charged-to-neutral correlation at forward rapidity in Au+Au collisions at $\sqrt{s_{NN}}$=200 GeV