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Large-angle production of charged pions with incident pion beams on nuclear targets

The HARP collaboration Apollonio, M. ; Artamonov, A. ; Bagulya, A. ; et al.
Phys.Rev.C 80 (2009) 065207, 2009.
Inspire Record 825244 DOI 10.17182/hepdata.50467

Measurements of the double-differential pi+/- production cross-section in the range of momentum 100 MeV/c <= p <= 800 MeV/c and angle 0.35 rad <= theta <= 2.15 rad using pi+/- beams incident on beryllium, aluminium, carbon, copper, tin, tantalum and lead targets are presented. The data were taken with the large acceptance HARP detector in the T9 beam line of the CERN PS. The secondary pions were produced by beams in a momentum range from 3 GeV/c to 12.9 GeV/c hitting a solid target with a thickness of 5% of a nuclear interaction length. The tracking and identification of the produced particles was performed using a small-radius cylindrical time projection chamber (TPC) placed inside a solenoidal magnet. Incident particles were identified by an elaborate system of beam detectors. Results are obtained for the double-differential cross-sections d2sigma/dpdtheta at six incident beam momenta. Data at 3 GeV/c, 5 GeV/c, 8 GeV/c, and 12 GeV/c are available for all targets while additional data at 8.9 GeV/c and 12.9 GeV/c were taken in positive particle beams on Be and Al targets, respectively. The measurements are compared with several generators of GEANT4 and the MARS Monte Carlo simulation.

252 data tables
Table 1

No description provided.

Table 2

No description provided.

Table 3

No description provided.

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Cross-sections of large-angle hadron production in proton- and pion-nucleus interactions IV: Copper nuclei and beam momenta from +/-3 GeV/c to +/-15 GeV/c

The HARP-CDP collaboration Bolshakova, A. ; Boyko, I. ; Chelkov, G. ; et al.
Eur.Phys.J.C 64 (2009) 181-241, 2009.
Inspire Record 823636 DOI 10.17182/hepdata.52601

We report on double-differential inclusive cross-sections of the production of secondary protons, charged pions, and deuterons, in the interactions with a 5% nuclear interaction length thick stationary copper target, of proton and pion beams with momentum from +/-3 GeV/c to +/-15 GeV/c. Results are given for secondary particles with production angles between 20 and 125 degrees.

93 data tables
Table 17

Measured cross section as a function of PT for PI- production from a P beam of momentum 3 GeV/c in the angular range 20 to 30 DEG.

Table 18

Measured cross section as a function of PT for PI- production from a P beam of momentum 3 GeV/c in the angular range 30 to 40 DEG.

Table 19

Measured cross section as a function of PT for PI- production from a P beam of momentum 3 GeV/c in the angular range 40 to 50 DEG.

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Precision measurements of the pp ---> pi+ pn and pp ---> pi+ d reactions: Importance of long-range and tensor force effects

The COSY-GEM collaboration Budzanowski, A. ; Chatterjee, A. ; Hawranek, P. ; et al.
Phys.Rev.C 79 (2009) 061001, 2009.
Inspire Record 818511 DOI 10.17182/hepdata.52961

Inclusive measurements of pion production in proton--proton collisions in the forward direction were undertaken at 400 and 600 MeV at COSY using the Big Karl spectrograph. The high resolution in the $\pi^+$ momentum ensured that there was an unambiguous separation of the $pp\to {\pi}^+d/\pi^+pn$ channels. Using these and earlier data, the ratio of the production cross sections could be followed through the $\Delta$ region and compared with the predictions of final state interaction theory. Deviations are strongly influenced by long-range terms in the production operator and the tensor force in the final $pn$ system. These have been investigated in a realistic $pp\to\pi^+d/\pi^+pn$ calculation that includes $S \rightleftharpoons D$ channel coupling between the final nucleons. A semi-quantitative understanding of the observed effects is achieved.

0 data tables

Cross-Sections of Large-Angle Hadron Production in Proton- and Pion-Nucleus Interactions III: Tantalum Nuclei and Beam Momenta from +/-3 Gev/c to +/-15 Gev/c

The HARP-CDP collaboration Bolshakova, A. ; Boyko, I. ; Chelkov, G. ; et al.
Eur.Phys.J.C 63 (2009) 549-609, 2009.
Inspire Record 822058 DOI 10.17182/hepdata.50528

We report on double-differential inclusive cross-sections of the production of secondary protons, charged pions, and deuterons, in the interactions with a 5% nuclear interaction length thick stationary tantalum target, of proton and pion beams with momentum from +/-3 GeV/c to +/-15 GeV/c. Results are given for secondary particles with production angles between 20 and 125 degrees. They are of particular relevance for the optimization of the design parameters of the proton driver of a neutrino factory.

375 data tables
Table 1

Measured cross section as a function of PT for P production from a P beam of momentum 3 GeV/c in the angular range 20 to 30 DEG.

Table 2

Measured cross section as a function of PT for P production from a P beam of momentum 3 GeV/c in the angular range 30 to 40 DEG.

Table 3

Measured cross section as a function of PT for P production from a P beam of momentum 3 GeV/c in the angular range 40 to 50 DEG.

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V^0 production in p+A collisions at \sqrt{s} = 41.6 GeV

The HERA-B collaboration Abt, I. ; Adams, M. ; Agari, M. ; et al.
Eur.Phys.J.C 61 (2009) 207-221, 2009.
Inspire Record 810078 DOI 10.17182/hepdata.52478

Inclusive doubly differential cross sections d^2\sigma_{pA}/dx_Fdp_T^2 as a function of Feynman-x (x_F) and transverse momentum (p_T) for the production of K^0_s, Lambda^0 and anti-Lambda^0 in proton-nucleus interactions at 920 GeV are presented. The measurements were performed by HERA-B in the negative x_F range (-0.12<x_F<0.0) and for transverse momenta up to p_T= 1.6 GeV/c. Results for three target materials: carbon, titanium and tungsten are given. The ratios of production cross sections are presented and discussed. The Cronin effect is clearly observed for all three V^0 species. The atomic number dependence is parameterized as \sigma_{pA} = \sigma_{pN} \cdot A^\alpha where \sigma_{pN} is the proton-nucleon cross section. The measured values of \alpha are all near one. The results are compared with EPOS 1.67 and PYTHIA 6.3. EPOS reproduces the data to within \approx 20% except at very low transverse momentum.

0 data tables

Cross-sections of large-angle hadron production in proton- and pion-nucleus interactions II: beryllium nuclei and beam momenta from +/- 3 GeV/c to +/-15 GeV/c

The HARP-CDP collaboration Bolshakova, A. ; Boyko, I. ; Chelkov, G. ; et al.
Eur.Phys.J.C 62 (2009) 697-754, 2009.
Inspire Record 815326 DOI 10.17182/hepdata.52077

We report on double-differential inclusive cross-sections of the production of secondary protons and charged pions, in the interactions with a 5% interaction length thick stationary beryllium target, of proton and pion beams with momentum from +/-3 GeV/c to +/-15 GeV/c. Results are given for secondary particles with production angles between 20 and 125 degrees.

0 data tables

Forward production of charged pions with incident $\pi^{\pm}$ on nuclear targets measured at the CERN PS

The HARP collaboration Apollonio, M. ; Artamonov, A. ; Bagulya, A. ; et al.
Nucl.Phys.A 821 (2009) 118-192, 2009.
Inspire Record 813159 DOI 10.17182/hepdata.51841

Measurements of the double-differential $\pi^{\pm}$ production cross-section in the range of momentum $0.5 \GeVc \leq p \le 8.0 \GeVc$ and angle $0.025 \rad \leq \theta \le 0.25 \rad$ in interactions of charged pions on beryllium, carbon, aluminium, copper, tin, tantalum and lead are presented. These data represent the first experimental campaign to systematically measure forward pion hadroproduction. The data were taken with the large acceptance HARP detector in the T9 beam line of the CERN PS. Incident particles, impinging on a 5% nuclear interaction length target, were identified by an elaborate system of beam detectors. The tracking and identification of the produced particles was performed using the forward spectrometer of the HARP detector. Results are obtained for the double-differential cross-sections $ {{\mathrm{d}^2 \sigma}}/{{\mathrm{d}p\mathrm{d}\Omega}} $ mainly at four incident pion beam momenta (3 \GeVc, 5 \GeVc, 8 \GeVc and 12 \GeVc). The measurements are compared with the GEANT4 and MARS Monte Carlo simulation

154 data tables
Table 1

Double differential PI+ and PI- production cross section in the laboratory system for PI- BE interactions at 3, 5, 8 and 12 GeV for the angular range 0.05 to 0.10 radians.

Table 2

Double differential PI+ and PI- production cross section in the laboratory system for PI- BE interactions at 3, 5, 8 and 12 GeV for the angular range 0.10 to 0.15 radians.

Table 3

Double differential PI+ and PI- production cross section in the laboratory system for PI- BE interactions at 3, 5, 8 and 12 GeV for the angular range 0.15 to 0.20 radians.

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Cross-Sections of Large-Angle Hadron Production in Proton- and Pion-Nucleus Interactions I: Beryllium Nuclei and Beam Momenta of +8.9 Gev/c and -8.0 Gev/c

The HARP-CDP Group collaboration Bolshakova, A. ; Boyko, I. ; Chelkov, G. ; et al.
Eur.Phys.J.C 62 (2009) 293-317, 2009.
Inspire Record 811688 DOI 10.17182/hepdata.51594

We report on double-differential inclusive cross-sections of the production of secondary protons, deuterons, and charged pions and kaons, in the interactions with a 5% nuclear interaction length thick stationary beryllium target, of a +8.9 GeV/c proton and pion beam, and a -8.0 GeV/c pion beam. Results are given for secondary particles with production angles between 20 and 125 degrees.

76 data tables
Table 1

Double differential inclusive cross section for the reaction P BE --> P X with an 8.9 GeV beam and production angle 20 to 30 degrees.

Table 2

Double differential inclusive cross section for the reaction P BE --> P X with an 8.9 GeV beam and production angle 30 to 40 degrees.

Table 3

Double differential inclusive cross section for the reaction P BE --> P X with an 8.9 GeV beam and production angle 40 to 50 degrees.

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Measurement of charged current deep inelastic scattering cross sections with a longitudinally polarised electron beam at HERA

The ZEUS collaboration Chekanov, S. ; Derrick, M. ; Magill, S. ; et al.
Eur.Phys.J.C 61 (2009) 223-235, 2009.
Inspire Record 810120 DOI 10.17182/hepdata.51622

Measurements of the cross sections for charged current deep inelastic scattering in e-p collisions with longitudinally polarised electron beams are presented. The measurements are based on a data sample with an integrated luminosity of 175 pb-1 collected with the ZEUS detector at HERA at a centre-of-mass energy of 318 GeV. The total cross section is given for positively and negatively polarised electron beams. The differential cross-sections dsigma/dQ2, dsigma/dx and dsigma/dy are presented for Q2>200 GeV2. The double-differential cross-section d2sigma/dxdQ2 is presented in the kinematic range 280&lt;Q2&lt;30000 GeV2 and 0.015&lt;x&lt;0.65. The measured cross sections are compared with the predictions of the Standard Model.

38 data tables
Table 1

Total cross section for CC DIS events for two values of the longitudinal polarization of the electron beam.

Table 2

Total cross section for CC DIS events as a function of the longitudinal polarization of the electron beam.

Table 3

Differential cross section DSIG/DQ**2 for the two values of longitudinal polarization of the electron beam.

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Forward pi+/- production in p-O2 and p-N2 interactions at 12 GeV/c

The HARP collaboration Catanesi, M.G. ; Radicioni, E. ; Edgecock, R. ; et al.
Astropart.Phys. 30 (2008) 124-132, 2008.
Inspire Record 790079 DOI 10.17182/hepdata.50531

Measurements of double-differential charged pion production cross-sections in interactions of 12 GeV/c protons on O_2 and N_2 thin targets are presented in the kinematic range 0.5 GeV/c &lt; p_{\pi} &lt; 8 GeV/c and 50 mrad &lt; \theta_{\pi} &lt; 250 mrad (in the laboratory frame) and are compared with p--C results. For p--N_2 (p--O_2) interactions the analysis is performed using 38576 (7522) reconstructed secondary pions. The analysis uses the beam instrumentation and the forward spectrometer of the HARP experiment at CERN PS. The measured cross-sections have a direct impact on the precise calculation of atmospheric neutrino fluxes and on the improved reliability of extensive air shower simulations by reducing the uncertainties of hadronic interaction models in the low energy range. In particular, the present results allow the common hypothesis that p--C data can be used to predict the p--N_2 and p--O_2 pion production cross-sections to be tested.

12 data tables
Table 1

Double differential cross section for pion production in P-N2 interactions for the pion scattered polar angle range 50 to 100 mrad.

Table 2

Double differential cross section for pion production in P-N2 interactions for the pion scattered polar angle range 100 to 150 mrad.

Table 3

Double differential cross section for pion production in P-N2 interactions for the pion scattered polar angle range 150 to 200 mrad.

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