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R.A. Johnson

Lawrence Berkeley National Laboratory

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Featured researches published by R.A. Johnson.

Physics Letters B | 1978

Angular dependence of high-transverse-momentum inclusive π0 production in π±p and pp interactions☆

G. Donaldson; H. A. Gordon; Kwan-Wu Lai; I. Stumer; A.V. Barnes; D.J. Mellema; A. V. Tollestrup; R.L. Walker; O. I. Dahl; R.A. Johnson; A. Ogawa; M. Pripstein; S. Shannon

Abstract We have measured the inclusive π0 production at high transverse momentum from both pion and proton beams at 100 and 200 GeV/c. Salient characteristics are a wide plateau in the cm angular distribution and evidence for scaling in both πp and pp interactions. The π±p→π0X cross sections fall less steeply with x| = (p|/pmax)cm, and peak at x| = 0.14, in contrast to the pp→π0X cross sections, which peak at x| = 0.

Physical Review Letters | 1976

Pion Charge Exchange Scattering at High-Energies

A.V. Barnes; D.J. Mellema; Alvin V. Tollestrup; R.L. Walker; O. I. Dahl; R.A. Johnson; R. W. Kenney; M. Pripstein

Physical Review Letters | 1976

Reaction. pi. /sup -/p. -->. etan at high energies

O. I. Dahl; R.A. Johnson; R. W. Kenney; M. Pripstein; A.V. Barnes; D.J. Mellema; Alvin V. Tollestrup; R.L. Walker

Physical Review Letters | 1976

Inclusive π 0 Production at Large Transverse Momentum from π ± p and pp Interactions at 100 and 200 GeV/ c

G. Donaldson; H. A. Gordon; Kwan-Wu Lai; I. Stumer; A.V. Barnes; J. Mellema; A. V. Tollestrup; R.L. Walker; O. I. Dahl; R.A. Johnson; A. Ogawa; M. Pripstein; S. Shannon

Physical Review Letters | 1978

Inclusive eta production at large transverse momenta

G. Donaldson; H. A. Gordon; Kwan-Wu Lai; I. Stumer; A.V. Barnes; D.J. Mellema; Alvin V. Tollestrup; R.L. Walker; O. I. Dahl; R.A. Johnson; A. Ogawa; M. Pripstein; S. Shannon

Physical Review Letters | 1976

Inclusive. pi. /sup 0/ production at large transverse momentum from. pi. /sup + -/p and pp interactions at 100 and 200 GeV/c

G. Donaldson; H. A. Gordon; Kwan-Wu Lai; I. Stumer; A.V. Barnes; J. Mellema; Alvin V. Tollestrup; R.L. Walker; O. I. Dahl; R.A. Johnson; A. Ogawa; M. Pripstein; S. Shannon

Physical Review Letters | 1977

Reaction. pi. /sup -/p. --> omega. n at momenta from 20 to 200 GeV/c

O. I. Dahl; R.A. Johnson; R. W. Kenney; M. Pripstein; A.V. Barnes; D.J. Mellema; Alvin V. Tollestrup; R.L. Walker

Physical Review Letters | 1978

COMPARISON OF HIGH TRANSVERSE MOMENTUM PI0 PRODUCTION FROM PI-, K-, P, AND ANTI-P BEAMS.

G. Donaldson; S. Shannon; D.J. Mellema; H. A. Gordon; M. Pripstein; O. I. Dahl; R.L. Walker; A. Ogawa; R.A. Johnson; I. Stumer; Kwan-Wu Lai; A.V. Barnes; Alvin V. Tollestrup

Physical Review Letters | 1978

Comparison of high-transverse-momentum. pi. /sup 0/ production from. pi. /sup -/, K/sup -/, p, and p beams

G. Donaldson; H. A. Gordon; Kwan-Wu Lai; I. Stumer; A.V. Barnes; D.J. Mellema; Alvin V. Tollestrup; R.L. Walker; O. I. Dahl; R.A. Johnson; A. Ogawa; M. Pripstein; S. Shannon

Physics Letters B | 1984

Pion-pair production from gammagamma interactions at PEP and the radiative width of the fo meson

A. Courau; R.A. Johnson; S. S. Sherman; W.B. Atwood; P. Baillon; Barry C. Barish; G. R. Bonneaud; G. J. Donaldson; R. Dubois; M. M. Duro; E. E. Elsen; S. G. Gao; Y. Z. Huang; G. M. Irwin; H. Kichimi; J. Kirkby; D. E. Klem; D. E. Koop; J. Ludwig; G.B. Mills; A. Ogawa; T. Pal; D. Perret-Gallix; R. Pitthan; D. L. Pollard; C. Prescott; L. Z. Rivkin; L. S. Rochester; W. Ruckstuhl; M. Sakuda

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