HEPData Search

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Scattering of positrons and electrons from protons

Bartel, W. ; Dudelzak, B. ; Krehbiel, H. ; et al.

Phys.Lett.B 25 (1967) 242-245, 1967.

Inspire Record 1389651 DOI 10.17182/hepdata.29449

The ration R = σ(e + = p)/σ(e − + p) of the elastic scattering cross section of positrons and electrons on protons was measured at momentum transfers of 11.66 fm −2 and 35.1 fm −2 . The results are consistent with R = 1.

1 data table

Table 1

No description provided.

Annihilations of 5.7 GeV/c $\bar{p}$ in hydrogen into four charged pions

Accensi, A. ; Alles-Borelli, V. ; French, B. ; et al.

Phys.Lett. 20 (1966) 557-559, 1966.

Inspire Record 1389655 DOI 10.17182/hepdata.30034

Annihilations of 5.7 GeV/ c antiprotons in hydrogen into four charged pions have been studied. Production of ϱ o and f o mesons and a possible enhancement in both π ± π ± and π + π − mass distributions at 1.54 GeV is seen. Upper limits for quasi 2-body annihilations are given.

1 data table

Table 1

No description provided.

The charge exchange $K^- + p \to K^0 + n$ at 9.50 GeV/c

Astbury, P. ; Finocchiaro, G. ; Michelini, A. ; et al.

Phys.Lett. 16 (1965) 328-331, 1965.

Inspire Record 1389639 DOI 10.17182/hepdata.30381

None

2 data tables

Table 1

No description provided.

Table 2

No description provided.

Backward scattering of positrons and electrons on protons

Bouquet, B. ; Benaksas, D. ; Grossetête, B. ; et al.

Phys.Lett.B 26 (1968) 178-180, 1968.

Inspire Record 1389620 DOI 10.17182/hepdata.29320

The ratio R = σ (e + + p)/ σ (e − + p) of the elastic scattering cross-section detecting the recoil proton at 0 o in coincidence with the backward electron or positron was found to be R = 1.036 ± 0.018 at q 2 = 8 fm −2 , R = 1.079 ± 0.046 at q 2 = 32 fm −2 .

2 data tables

Table 1

Axis error includes +- 0.0/0.0 contribution (?////Errors presented are the total combined statistical and systematic error s. Radiative corrections applied).

Table 2

Axis error includes +- 0.0/0.0 contribution (?////Errors presented are the total combined statistical and systematic error s. Radiative corrections applied).

Photodisintegration of the deuteron from 140 to 400 MeV

Buon, J. ; Gracco, V. ; Lefrancois, J. ; et al.

Phys.Lett.B 26 (1968) 595-597, 1968.

Inspire Record 1389633 DOI 10.17182/hepdata.29331

The angular distributions for deuteron photodisintegration have been measured in the energy region 140 – 400 MeV for recoil protons laboratory angles between 30° and 130°. The protons were analyzed in momentum with a magnetic spectrometer and detected by a counter hodoscope.

1 data table

Table 1

No description provided.

Low energy $\Lambda p \to \Lambda p$ cross section measurement and determination of S-wave scattering lengths

Alexander, G. ; Benary, O. ; Karshon, U. ; et al.

Phys.Lett. 19 (1966) 715-719, 1966.

Inspire Record 1389622 DOI 10.17182/hepdata.30161

The Λ p å Λ p cross section has been measured in the Λ-momentum range of 120 to 320 MeV/ c using 238 events. A comparison with the effective range approximation yielded the values a s = −2.46, a t = −2.07, r s = 3.87 and r t = 4.50 in fm.

1 data table

Table 1

No description provided.

Neutrons from the breakup of $^{19}$C

Marqués, F.M. ; Liegard, E. ; Orr, N.A. ; et al.

Phys.Lett.B 381 (1996) 407-412, 1996.

Inspire Record 1389647 DOI 10.17182/hepdata.55047

Neutrons arising from the breakup of a 30 MeV/nucleon 19 C beam on a tantalum target have been measured using the 98 element array DEMON. A narrow, forward peaked neutron angular distribution, with a corresponding momentum spread considerably smaller than those measured simultaneously for 21 N, 22 O and 24 F, was observed for charged fragments with Z < Z proj . Interpreted in terms of the core-breakup reaction model, the results support the existence of a one neutron halo in 19 C.

2 data tables

Table 1

No description provided.

Table 2

No description provided.

Total charge-changing cross sections for neutron-deficient isotopes from $^{58}$Ni fragmentation

Blank, B. ; Andriamonje, S. ; Del Moral, R. ; et al.

Z.Phys.A 352 (1995) 69-75, 1995.

Inspire Record 1389077 DOI 10.17182/hepdata.16503

At the projectile-fragment separator FRS of GSI, relativistic secondary beams of about 520 MeV/nucleon were produced by fragmentation of a primary beam of58Ni at 650 MeV/nucleon in a beryllium target. By means of aΔE—Bρ—TOF measurement, the fragments have been identified and their charge-changing probabilities in targets of CH2, C, Al, and Pb have been determined. We describe the results for the total charge-changing cross sections in this first paper, whereas a second article deals with the partial charge-changing cross sections. At the drip line, the measured charge-changing cross sections exhaust close to 100% of the total interaction cross sections as calculated with semiempirical models. The measurements at the proton drip line with low-Z targets indicate that only a very small increase of the cross sections may be observed, whereas the measurements with a lead target show that no significant increase of the total charge-changing cross sections is present which would be a hint for low-lying dipole strength. Our experimental data are compared to Glauber-type calculations.

24 data tables

Table 1

Nucleus is C H2.

Table 2

Nucleus is C H2.

Table 3

Nucleus is C H2.

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Multinucleon phenomena and proton spectra characterizing antiproton annihilation at rest in nuclei

Minor, E.D. ; Armstrong, T.A. ; Chen, B. ; et al.

Z.Phys.A 342 (1992) 447-454, 1992.

Inspire Record 1389078 DOI 10.17182/hepdata.16580

Spectra of protons with momenta greater than 500 MeV/c following antiproton annihilation at rest in carbon and uranium nuclei have been measured. They are compared to recent results from other experiments and to predictions of an intranuclear cascade model. Evidence is presented for a substantialB>0 component in the annihilation process, and an estimate of the magnitude of that component is made.

2 data tables

Table 1

No description provided.

Table 2

No description provided.