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Featured researches published by Maruyama T.


Physical Review D | 1987

Search for single electrons from supersymmetric-particle production.

Fernandez E; Ford Wt; Qi N; Alexander Lincoln Read; Smith Jg; Tiziano Camporesi; Peruzzi I I; Piccolo M; Hurst Rb; Lau Kh; Pyrlik J; Venuti Jp; Wald Hb; Weinstein R; Band Hr; Gettner Mw; Goderre Gp; Moromisato Jh; Shambroom Wd; Sleeman Jc; von Goeler E; Ash Ww; Chadwick Gb; Leedy Re; Messner Rl; Moss Lj; Muller F; Nelson Hn; Ritson Dm; Rosenberg Lj

A search for single electrons produced by the decay of singly produced supersymmetric electrons (e-italic-tilde) or Ws (W-italic-tilde) within the MAC detector at the SLAC storage ring PEP has been performed in e/sup +/e/sup -/ annihilations at ..sqrt..s = 29 GeV. No evidence of supersymmetric-particle production is observed in a data sample with an integrated luminosity of 206 pb/sup -1/. Limits on possible masses of supersymmetric electrons and photons (gamma-tilde) are presented. The e-italic-tilde mass limit is m/sub e-italic-tilde/>24.5 GeV/c/sup 2/ at the 90% confidence level if m/sub e-italic-tilde//sub >//sub L//sub =/ = m/sub e-tilde//sub =/ and m/sub gamma-tilde/ = 0. If m/sub e-italic-tilde//sub >//sub L//sub =/>>m/sub e-tilde//sub =/, the corresponding limit is m/sub e-italic-tilde//sub >//sub R//sub =/>23.3 GeV/c/sup 2/. Limits on possible masses of supersymmetric Ws and neutrinos (nu-tilde) are also presented. The W-italic-tilde mass limit is m/sub W-italic-tilde/>22.0 GeV/c/sup 2/ at the 90% confidence level if m/sub nu-tilde/ = 0.


Physical Review Letters | 1985

Measurement of tau lifetime and branching ratios.

Fernandez E; Ford Wt; Qi N; Alexander Lincoln Read; Smith Jg; Tiziano Camporesi; de Sangro R; Marini A; Peruzzi I I; Piccolo M; Ronga F; Blume Ht; Hurst Rb; Venuti Jp; Wald Hb; Weinstein R; Band Hr; Gettner Mw; Goderre Gp; Meyer Oa; Moromisato Jh; Shambroom Wd; Sleeman Jc; von Goeler E; Ash Ww; Chadwick Gb; Clearwater Sh; Coombes Rw; Kaye Hs; Lau Kh


Physical Review Letters | 1985

Precision Measurement of Electroweak Effects in e+e---> micro+ micro- at sqrt s =29 GeV.

Ash Ww; Band Hr; Blume Ht; Tiziano Camporesi; Chadwick Gb; Clearwater Sh; Coombes Rw; Delfino Mc; Fernandez E; Ford Wt; Gettner Mw; Goderre Gp; Groom De; Heltsley Bk; Hurst Rb; Johnson; Lau Kh; Lavine Tl; Leedy Re; Lippi I I; Maruyama T; Messner Rl; Moromisato Jh; Moss Lj; Muller F; Nelson Hn; Peruzzi I I; Piccolo M; Prepost R; Qi N


Physical Review Letters | 1987

Observation of charge asymmetry in hadron jets from e+e- annihilation at sqrt s =29 GeV.

Ash Ww; Band Hr; Tiziano Camporesi; Chadwick Gb; Delfino Mc; de Sangro R; Ford Wt; Gettner Mw; Goderre Gp; Groom De; Hurst Rb; Johnson; Lau Kh; Lavine Tl; Leedy Re; Maruyama T; Messner Rl; Moromisato Jh; Moss Lj; Muller F; Nelson Hn; Peruzzi I I; Piccolo M; Prepost R; Pyrlik J; Qi N; Alexander Lincoln Read; Ritson Dm; Ronga F; Rosenberg Lj


Physical Review Letters | 1985

Direct photon production in e+e- annihilation.

Fernandez E; Ford Wt; Qi N; Alexander Lincoln Read; Smith Jg; Tiziano Camporesi; de Sangro R; Marini A; Peruzzi I I; Piccolo M; Ronga F; Blume Ht; Hurst Rb; Sleeman Jc; Venuti Jp; Wald Hb; Weinstein R; Band Hr; Gettner Mw; Goderre Gp; Meyer Oa; Moromisato Jh; Shambroom Wd; von Goeler E; Ash Ww; Chadwick Gb; Clearwater Sh; Coombes Rw; Kaye Hs; Lau Kh


Physical Review Letters | 1985

Electroweak effects in e+e---> tau + tau - at 29 GeV.

Fernandez E; Ford Wt; Qi N; Alexander Lincoln Read; Smith Jg; Tiziano Camporesi; de Sangro R; Marini A; Peruzzi I I; Piccolo M; Ronga F; Blume Ht; Hurst Rb; Venuti Jp; Wald Hb; Weinstein R; Band Hr; Gettner Mw; Goderre Gp; Meyer Oa; Moromisato Jh; Shambroom Wd; Sleeman Jc; von Goeler E; Ash Ww; Chadwick Gb; Clearwater Sh; Coombes Rw; Kaye Hs; Lau Kh


Physical Review Letters | 1987

Precise measurement of the lifetime of the tau lepton.

Band Hr; Bosman M; Tiziano Camporesi; Chadwick Gb; Delfino Mc; de Sangro R; Ford Wt; Gettner Mw; Goderre Gp; Godfrey Gl; Groom De; Hurst Rb; Johnson; Lavine Tl; Leedy Re; Lippi I I; Maruyama T; Messner Rl; Moss Lj; Muller F; Nelson Hn; Peruzzi I I; Piccolo M; Prepost R; Pyrlik J; Qi N; Alexander Lincoln Read; Ritson Dm; Rosenberg Lj; Sleeman Jc


Physical Review Letters | 1985

Precise measurements of the leptonic branching ratios of the tau lepton.

Ash Ww; Band Hr; Blume Ht; Tiziano Camporesi; Chadwick Gb; Coombes Rw; Delfino Mc; Fernandez E; Ford Wt; Gettner Mw; Goderre Gp; Groom De; Heltsley Bk; Hurst Rb; Johnson; Lau Kh; Lavine Tl; Leedy Re; Lippi I I; Maruyama T; Messner Rl; Moromisato Jh; Moss Lj; Muller F; Nelson Hn; Peruzzi I I; Piccolo M; Prepost R; Qi N; Alexander Lincoln Read


Physical Review D | 1987

Measurement of the polarization of tau leptons produced in e+e- annihilation at sqrt s =29 GeV.

Ford Wt; Qi N; Alexander Lincoln Read; Smith Jg; Tiziano Camporesi; de Sangro R; Peruzzi I I; Piccolo M; Hurst Rb; Pyrlik J; Venuti Jp; Weinstein R; Gettner Mw; Goderre Gp; Sleeman Jc; von Goeler E; Chadwick Gb; Leedy Re; Messner Rl; Moss Lj; Muller F; Nelson Hn; Ritson Dm; Rosenberg Lj; Wiser De; Zdarko Rw; Groom De; Verdini Pg; Band Hr; Delfino Mc


Physical Review D | 1987

Precise measurement of the branching fraction for the decay tau. --> nu. /sub tau/. pi

Ford Wt; Qi N; Alexander Lincoln Read; Smith Jg; Tiziano Camporesi; Peruzzi I I; Piccolo M; Hurst Rb; Lau Kh; Pyrlik J; Venuti Jp; Wald Hb; Weinstein R; Band Hr; Gettner Mw; Goderre Gp; Moromisato Jh; Shambroom Wd; Sleeman Jc; von Goeler E; Ash Ww; Chadwick Gb; Leedy Re; Messner Rl; Moss Lj; Muller F; Nelson Hn; Ritson Dm; Rosenberg Lj; Wiser De

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