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Featured researches published by K. Abe.


Physics Letters B | 1977

Nuclear size dependence of inclusive particle production

D. A. Garbutt; R.W. Rusack; I. Siotis; D. Gross; D. Nitz; S. L. Olsen; K. Abe; R. Bomberowitz; K. Cohen; P. Goldhagen; F. Sannes; D. Saroff; J. Willison

Abstract The inclusive production of π+, π−, K+, K−, p and p for protons incident on carbon and tungsten targets was studied at the Internal Target Area of the Fermilab. We assume an Aα dependence for the inclusive cross sections and report here on the variation of α with incident momentum, transverse momentum and particle species.


Physical Review Letters | 1984

Study of the

K. Abe; R.I. Hulsizer; R.K. Yamamoto; C.G. Wilkins; T. Handler; H.J. Hargis; S. Tether; R. Erickson; W.A. Mann; S. Yamashita; A. Napier; T. Kitagaki; H. Sagawa; James Brau; G. Kalmus; R. Gearhart; W.D. Walker; C. Milstene; R. Sugahara; S.J. Sewell; R. Merenyi; K.C. Moffeit; A. Suzuki; K. Takahashi; A. Levy; J. Schneps; John Butler; J. Shank; Y. Yoshimura; J. Goldberg

We have observed the ..pi../sup +/..pi../sup -/ decay of the rho(1600) in the production reaction ..gamma..p..-->..rhop at 20 GeV. Using a calculation which takes into account the interference of the rho with the rho(770) and a Drell background, we find good evidence that this resonance is a radial excitation of the rho(770). The background interference strongly distorts the angular distributions predicted by a purely s-channel helicity-conserving production mechanism. We measure m/sub 0/ = (1.55 +- 0.07) GeV/c/sup 2/ and GAMMA/sub 0/ = (0.28/sub -0.08//sup +0.03/) GeV/c/sup 2/.


Physical Review Letters | 1985

\rho^\prime

L.A. Ahrens; D. Cutts; S. J. Murtagh; B. Gibbard; S. M. Heagy; S. Terada; Y. Maeda; D.C. Doughty; Marx; Takao Shinkawa; L. S. Durkin; S. H. Aronson; T. York; E.W. Beier; T. Miyachi; Y. Nagashima; M.J. Murtagh; D. H. White; M. M. Hurley; J. S. Hoftun; K. Amako; A.K. Mann; H. H. Williams; S. Kabe; D. Hedin; S. Tatsumi; K. Abe; P. L. Connolly; J.L. Callas; Y. Suzuki

Measurements of the semileptonic weak neutral-current reactions ..nu../sub ..mu../p..--> nu../sub ..mu../p and nu-bar/sub ..mu../p..-->..nu-bar/sub ..mu../p which yield the absolute differential cross sections dsigma(..nu../sub ..mu../p)/dQ/sup 2/ and dsigma(nu-bar/sub ..mu../p)/dQ/sup 2/ described. The weak-neutral-current parameter, sin/sup 2/theta/sub W/, is determined to be sin/sup 2/theta/sub W/ = 0.220 +- 0.016 (stat)/sub -0.031//sup +0.023/(syst).


Physical Review Letters | 1984

(1600) Mass Region Using

K. Abe; T. C. Bacon; J. Ballam; A.V. Bevan; H.H. Bingham; James Brau; K. Braune; D. Brick; W. Bugg; Butler Jm; W. Cameron; H.O. Cohn; D.C. Colley; S. Dado; R.N. Diamond; D. Dingus; R. Erickson; R.C. Field; B. Franek; N. Fujiwara; R. Gearhart; T. Glanzman; J. Goldberg; A.T. Goshaw; G. Hall; Edwin R. Hancock; T. Handler; H.J. Hargis; E.L. Hart; K. Hasegawa

We have observed the ..pi../sup +/..pi../sup -/ decay of the rho(1600) in the production reaction ..gamma..p..-->..rhop at 20 GeV. Using a calculation which takes into account the interference of the rho with the rho(770) and a Drell background, we find good evidence that this resonance is a radial excitation of the rho(770). The background interference strongly distorts the angular distributions predicted by a purely s-channel helicity-conserving production mechanism. We measure m/sub 0/ = (1.55 +- 0.07) GeV/c/sup 2/ and GAMMA/sub 0/ = (0.28/sub -0.08//sup +0.03/) GeV/c/sup 2/.


Physical Review Letters | 1986

\gamma p \to \pi^+ \pi^- p

K. Abe; L.A. Ahrens; K. Amako; S. H. Aronson; E.W. Beier; Callas Jl; Connolly Pl; David Cutts; Doughty Dc; Lloyd Stanley Durkin; B. Gibbard; Heagy Sm; Hedin D; J. S. Hoftun; Hurley M; Kabe S; Y. Kurihara; R. E. Lanou; Y. Maeda; A.K. Mann; Marx; T. Miyachi; Murtagh Mj; Murtagh S; Yorikiyo Nagashima; F. M. Newcomer; Takao Shinkawa; E. Stern; Yoshikazu Suzuki; Tatsumi S

Measurements of the semileptonic weak neutral-current reactions ..nu../sub ..mu../p..--> nu../sub ..mu../p and nu-bar/sub ..mu../p..-->..nu-bar/sub ..mu../p which yield the absolute differential cross sections dsigma(..nu../sub ..mu../p)/dQ/sup 2/ and dsigma(nu-bar/sub ..mu../p)/dQ/sup 2/ described. The weak-neutral-current parameter, sin/sup 2/theta/sub W/, is determined to be sin/sup 2/theta/sub W/ = 0.220 +- 0.016 (stat)/sub -0.031//sup +0.023/(syst).


Physical Review Letters | 1986

at 20-{GeV}

K. Abe; L.A. Ahrens; K. Amako; S. H. Aronson; E.W. Beier; J.L. Callas; P. L. Connolly; D. Cutts; D.C. Doughty; L. S. Durkin

Measurements of the semileptonic weak neutral-current reactions ..nu../sub ..mu../p..--> nu../sub ..mu../p and nu-bar/sub ..mu../p..-->..nu-bar/sub ..mu../p which yield the absolute differential cross sections dsigma(..nu../sub ..mu../p)/dQ/sup 2/ and dsigma(nu-bar/sub ..mu../p)/dQ/sup 2/ described. The weak-neutral-current parameter, sin/sup 2/theta/sub W/, is determined to be sin/sup 2/theta/sub W/ = 0.220 +- 0.016 (stat)/sub -0.031//sup +0.023/(syst).


Physical Review D | 1990

Precise Determination of Sin**2-

L.A. Ahrens; S. H. Aronson; P.L. Connolly; B. Gibbard; M.J. Murtagh; S. Murtagh; S. Terada; D. H. White; J.L. Callas; D. Cutts; M.V. Diwan; J. S. Hoftun; B.W. Hughlock; R. E. Lanou; Takao Shinkawa; Y. Kurihara; K. Amako; S. Kabe; Y. Nagashima; Y. Suzuki; S. Tatsumi; Y. Yamaguchi; K. Abe; E.W. Beier; D.C. Doughty; L. S. Durkin; S.M. Heagy; M. Hurley; A.K. Mann; F. M. Newcomer


Physical Review Letters | 1975

\theta^-

B. Robinson; K. Abe; J. Carr; J. Keyne; Antonio Pagnamenta; F. Sannes; I. Siotis; R. Stanek


Physical Review Letters | 1987

w From Measurements of the Differential Cross-sections for

K. Abe; L.A. Ahrens; K. Amako; S. H. Aronson; E.W. Beier; J.L. Callas; D. Cutts; M.V. Diwan; L. S. Durkin; B. Gibbard; S. M. Heagy; D. Hedin; J. S. Hoftun; M. M. Hurley; S. Kabe; Y. Kurihara; R. E. Lanou; A.K. Mann; Marx; M.J. Murtagh; Y. Nagashima; F. M. Newcomer; Takao Shinkawa; E. Stern; Y. Suzuki; S. Terada; D. H. White; H. H. Williams; Yoshio Yamaguchi


Physical Review D | 1986

\nu_\mu p \to \nu_\mu p

K. Abe; Armenteros R; T. C. Bacon; J. Ballam; H.H. Bingham; James Brau; K. Braune; D. Brick; W. Bugg; Butler Jm; W. Cameron; H.O. Cohn; D.C. Colley; G.T. Condo; P. Dingus; R. Erickson; R.C. Field; B. Franek; R. Gearhart; T. Glanzman; I.M. Godfrey; J. Goldberg; G. Hall; Edwin R. Hancock; H.J. Hargis; E.L. Hart; M.J. Harwin; K. Hasegawa; M. Jobes; T. Kafka

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L.A. Ahrens

Brookhaven National Laboratory

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S. H. Aronson

Brookhaven National Laboratory

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B. Gibbard

Brookhaven National Laboratory

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E.W. Beier

University of Pennsylvania

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