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Measurement of the Ratios of Deep Inelastic Muon - Nucleus Cross-Sections on Various Nuclei Compared to Deuterium

The European Muon collaboration Ashman, J. ; Badelek, B. ; Baum, Guenter ; et al.

Phys.Lett.B 202 (1988) 603-610, 1988.

Inspire Record 260668 DOI 10.17182/hepdata.29991

Results are presented on the ratios of the deep inelastic muon-nucleus cross sections for carbon, copper and tin nuclei to those measured on deuterium. The data confirm that the structure functions of the nucleon measured in nuclei are different from those measured on quasi-free nucleons in deuterium. The kinematic range of the data is such that 〈 Q 2 〉 ∼ 5 GeV 2 at x ∼ 0.03, increasing to 〈 Q 2 〉 ∼ 35 GeV 2 for x ∼ 0.65. The measured cross section ratios are less than unity for x ≲ 0.05 and for 0.25 ≲ x < 0.7. The decrease of the ratio below unity for low x becomes larger as A increases as might be expected from nuclear shadowing. However, this occurs at relatively large values of Q 2 (∼ 5 GeV 2 ) indicating that such shadowing is of patrionic origin.

3 data tables

Table 1

Q**2= 5.1,7.8,11.4,14.4,17.3,20.2,24.1,29.8,33.6 GEV**2.

Table 2

Q**2= 4.4,8.4,13.5,17.9,21.1,24.4,29.5,34.0,40.4 GEV**2.

Table 3

Q**2= 4.0,7.7,11.1,14.6,17.1,19.8,24.8,32.4 GEV**2.

Study of the Energy Flow in $^{16}$O Nucleus Collisions at 60-{GeV}/nucleon and 200-{GeV}/nucleon

The NA35 collaboration Heck, W. ; Bamberger, A. ; Bangert, D. ; et al.

Z.Phys.C 38 (1988) 19, 1988.

Inspire Record 262285 DOI 10.17182/hepdata.37151

We report a systematic study of mid-rapidityET production and forward energy flow in the interaction of16O projectiles on Al, Cu, Ag and Au at 60 and 200 GeV/nucleon. First results onET production with32S projectiles are presented.

0 data tables

POLARIZATION MEASUREMENT IN PION NUCLEON CHARGE EXCHANGE PI+ N (POLARIZED) ---> PI0 P AT 6-GEV/C

Fujisaki, M. ; De Lesquen, A. ; Babou, M. ; et al.

Nuovo Cim.A 99 (1988) 395-404, 1988.

Inspire Record 270461 DOI 10.17182/hepdata.37515

The polarization in pion-nucleon charge exchange was measured at 6 GeV/c incident momentum for 0.1 (GeV/c)2 < |t| < 1.6 (GeV/c)2. Using the channel π+ n ↑ → π0p allowed precise measurement of the recoil proton for good rejection of inelastic events. The results are compared with previous experiments using channel π−p ↑ with or without detection of the recoil neutron.

3 data tables

Table 1

No description provided.

Table 2

No description provided.

Table 3

No description provided.

PRODUCTION OF HIGH MOMENTUM NEGATIVE PIONS BY 800-MEV PROTONS AT 0-DEGREES TO 20-DEGREES

Barlow, D.B. ; Nefkens, B.M.K. ; Pillai, C.T. ; et al.

Nucl.Instrum.Meth.A 271 (1988) 471-474, 1988.

Inspire Record 270458 DOI 10.17182/hepdata.37244

The π − yield in the momentum range 500–740 MeV/ c produced by 800 MeV protons incident on targets of Be and C has been measured at laboratory production angles between 0° and 20°. The yield of 725 MeV/ c π − from Be and C at 0° is a factor of 6 greater than at 20°, for 600 MeV/ c π − the factor is 3. The yield from beryllium is typically 30% higher than from carbon.

2 data tables

Table 1

No description provided.

Table 2

No description provided.

TOTAL NEUTRON NUCLEUS CROSS-SECTIONS AT INTERMEDIATE-ENERGIES

Franz, J. ; Grotz, H.P. ; Lehmann, L. ; et al.

Nucl.Phys.A 490 (1988) 667-688, 1988.

Inspire Record 263460 DOI 10.17182/hepdata.37108

Total neutron cross sections have been measured for the nuclei Be, C, O, Al, V, Mn, Co, Cu, Ag, Ce, Ta, Pb, Bi and U at 22 energies from 160 MeV to 575 MeV by the transmission method. The energy region contains the threshold for pion production. Different parametrizations of the experimental results are discussed. A test of charge symmetry was obtained from the proton- and neutron-induced cross sections on C and O, yielding 〈 (σ p − σ n ) σ p 〉 = 0.0012 ± 0.0059 .

2 data tables

Table 1

No description provided.

Table 2

No description provided.

Observation of the Decay $\rho \to \pi^+ \pi^- \gamma$. (In Russian)

Vasserman, I.B. ; Golubev, V.B. ; Dolinsky, S.I. ; et al.

Sov.J.Nucl.Phys. 47 (1988) 1035-1037, 1988.

Inspire Record 272215 DOI 10.17182/hepdata.37130

None

2 data tables

Table 1

No description provided.

Table 2

No description provided.

LOW-ENERGY PION YIELD AT HIGH-ENERGY ACCELERATORS AS A FUNCTION OF THE PRIMARY PROTON BEAM MOMENTUM

Bertin, A. ; Bruschi, M. ; Capponi, M. ; et al.

Nuovo Cim.A 100 (1988) 305-308, 1988.

Inspire Record 270462 DOI 10.17182/hepdata.37844

High yields of low-momentum pions were obtained from high-energy primary proton beams. The results are discussed, also with respect to the possibility of setting up cloud muon beams from the very lowmomentum poins produced by 10 GeV/c protons.

1 data table

Table 1

Data obtained with 30 cm long target.