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Cross Section for $\gamma n \to \pi^0 n$ measured at Mainz/A2

The A2 collaboration Briscoe, W.J. ; Hadžimehmedović, M. ; Kudryavtsev, A.E. ; et al.
Phys.Rev.C 100 (2019) 065205, 2019.
Inspire Record 1748263 DOI 10.17182/hepdata.116236

The $\gamma n \to \pi^0 n$ differential cross section evaluated for 27 energy bins span the photon-energy range 290-813 MeV (W = 1.195-1.553 GeV) and the pion c.m. polar production angles, ranging from 18 deg to 162 deg, making use of model-dependent nuclear corrections to extract pi0 production data on the neutron from measurements on the deuteron target. Additionally, the total photoabsorption cross section was measured. The tagged photon beam produced by the 883-MeV electron beam of the Mainz Microtron MAMI was used for the 0-meson production. Our accumulation of 3.6 x 10^6 $\gamma n \to \pi^0 n$ events allowed a detailed study of the reaction dynamics. Our data are in reasonable agreement with previous A2 measurements and extend them to lower energies. The data are compared to predictions of previous SAID, MAID, and BnGa partial-wave analyses and to the latest SAID fit MA19 that included our data. Selected photon decay amplitudes $N^* \to \gamma n$ at the resonance poles are determined for the first time.

21 data tables
Table 1

Excitation function at pion c.m. angle THETA=18 deg as function of incident photon energy E. The uncertainties are statistical and systematic, combined in quadrature.

Table 2

Excitation function at pion c.m. angle THETA=32 deg as function of incident photon energy E. The uncertainties are statistical and systematic, combined in quadrature.

Table 3

Excitation function at pion c.m. angle THETA=41 deg as function of incident photon energy E. The uncertainties are statistical and systematic, combined in quadrature.

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Reanalysis of Rosenbluth measurements of the proton form factors

Gramolin, A.V. ; Nikolenko, D.M. ;
Phys.Rev.C 93 (2016) 055201, 2016.
Inspire Record 1431987 DOI 10.17182/hepdata.77063

We present a reanalysis of the data from Stanford Linear Accelerator Center (SLAC) experiments E140 [R. C. Walker et al., Phys. Rev. D 49, 5671 (1994)] and NE11 [L. Andivahis et al., Phys. Rev. D 50, 5491 (1994)] on elastic electron-proton scattering. This work is motivated by recent progress in calculating the corresponding radiative corrections and by the apparent discrepancy between the Rosenbluth and polarization transfer measurements of the proton electromagnetic form factors. New, corrected values for the scattering cross sections are presented, as well as a new form factor fit in the $Q^2$ range from 1 to 8.83 $\text{GeV}^2$. We also provide a complete set of revised formulas to account for radiative corrections in single-arm measurements of unpolarized elastic electron-proton scattering.

3 data tables
Table 1

Radiative corrections and differential cross sections obtained by reanalysis of the measurements.

Table 2

Radiative corrections and differential cross sections obtained by reanalysis of the measurements.

Table 3

Radiative corrections and differential cross sections obtained by reanalysis of the measurements.


REACTION OF QUASIELASTIC CHARGE EXCHANGE P HE-3 ---> N(F) P P P AT MEDIUM-ENERGIES. (IN RUSSIAN)

Blinov, A.V. ; Vanyushin, I.A. ; Grechko, V.E. ; et al.
Sov.J.Nucl.Phys. 47 (1988) 594, 1988.
Inspire Record 253277 DOI 10.17182/hepdata.9993

None

8 data tables
Table 1

N IS FAST IN LABORATORY SYSTEM. CUT FOR 'FAST' SELECTION WAS:. PLAB(P=3) > PMIN(P=3), WHERE PMIN IS DETERMINED FROM ALL EVENTS.

Table 2

N IS FAST IN LABORATORY SYSTEM. CUT FOR 'FAST' SELECTION WAS:. PLAB(P=3) > PMIN(P=4,5,6), WHERE PMIN IS DETERMINED FROM ALL EVENTS.

Table 3

No description provided.

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The yields of particles of 1 and 2 charges from proton interactions on $^{58}Ni$ and $^{64}Ni$ targets at 7.54 GeV energy

Krasnov, L.V. ; Lakomkin, Yu.A. ; Litvin, V.F. ; et al.
JINR-1-84-225, 2016.
Inspire Record 1501543 DOI 10.17182/hepdata.76287

None

11 data tables
Table 1

Axis error includes +- 20/20 contribution.

Table 2

Axis error includes +- 20/20 contribution.

Table 3

Axis error includes +- 20/20 contribution.

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The pi+ p interaction at 1.2 gev/c

Berthon, A. ; Mas, J. ; Narjoux, J.L. ; et al.
Nucl.Phys.B 81 (1974) 431-444, 1974.
Inspire Record 93412 DOI 10.17182/hepdata.7945

Experimental results are presented for the available channels in the 1.2 GeV/ c π + p interaction. An isobaric model with incoherent addition of the amplitudes is used to determine the π, Δ and N ∗ abundance rates in the π + π o p final state. The multipole parameters in the density matrix of the Δ ++ are determined as functions of its production angle.

7 data tables
Table 1

No description provided.

Table 2

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

Table 3

No description provided.

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High precision measurement of the associated strangeness production in proton proton interactions

The COSY-TOF collaboration Jowzaee, S. ; Borodina, E. ; Clement, H. ; et al.
Eur.Phys.J.A 52 (2016) 7, 2016.
Inspire Record 1393330 DOI 10.17182/hepdata.70735

A new high precision measurement of the reaction pp -> pK+Lambda at a beam momentum of 2.95 GeV/c with more than 200,000 analyzed events allows a detailed analysis of differential observables and their inter-dependencies. Correlations of the angular distributions with momenta are examined. The invariant mass distributions are compared for different regions in the Dalitz plots. The cusp structure at the N Sigma threshold is described with the Flatt\'e formalism and its variation in the Dalitz plot is analyzed.

9 data tables
Table 1

No description provided.

Table 2

No description provided.

Table 3

No description provided.

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Nucleon Space Distribution in Nuclei Zr-90 and Pb-208 from the Elastic Proton Scattering at 1-GeV

Alkhazov, G.D. ; Belostotsky, S.L. ; Vorobev, A.A ; et al.
Yad.Fiz. 26 (1977) 673-682, 1977.
Inspire Record 125632 DOI 10.17182/hepdata.70469

None

2 data tables
Table 1

X ERROR D(TARGET) = 95.80 PCT.

Table 2

X ERROR D(TARGET) = 97.50 PCT.


Inclusive production of pions by protons in nuclei at low energies

Guber, F.F. ; Kazarnovskii, M.V. ; Krasnov, V.A. ; et al.
JETP Lett. 31 (1980) 656, 1980.
Inspire Record 1408595 DOI 10.17182/hepdata.70448

None

3 data tables
Table 1

No description provided.

Table 2

No description provided.

Table 3

No description provided.


QUADRUPOLE EFFECT IN ELASTIC PROTON SCATTERING WITH 1-GEV ENERGY ON THE NUCLEI OF THE P SHELL. (IN RUSSIAN)

Alkhazov, G.D. ; Belostotsky, S.L. ; Vorobev, A.A ; et al.
Pisma Zh.Eksp.Teor.Fiz. 29 (1979) 88-92, 1979.
Inspire Record 145178 DOI 10.17182/hepdata.70237

None

26 data tables
Table 1

X ERROR D(THETA) = 0.2000 DEG.

Table 2

X ERROR D(TARGET) = 99.60 PCT. X ERROR D(THETA) = 0.2000 DEG.

Table 3

X ERROR D(THETA) = 0.2000 DEG.

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DCS for π − p elastic scattering from 1.2 to 3.0 GeV/ c and phase shift analysis

Aplin, P.S. ; Cowan, I.M. ; Gibson, W.M. ; et al.
Nucl.Phys.B 32 (1971) 253-284, 1971.
Inspire Record 1104030 DOI 10.17182/hepdata.69638

Differential cross sections have been measured for π − p elastic scattering at laboratory momenta in the range 1.2 to 3.0 GeV/ c for the c.m. range 0.97 > cos θ ∗ > −0.98 . The corresponding mass range is 1.78 to 2.56 GeV/ c 2 . The data was obtained from a counter experiment in which the scattered pions and protons were detected in coincidence by arrays of scintillation counters.

31 data tables
Table 1

No description provided.

Table 2

No description provided.

Table 3

No description provided.

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