HEPData Search

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OBSERVATION OF ANOMALOUS PRODUCTION OF MUON PAIRS IN e+ e- ANNIHILATION INTO FOUR LEPTON FINAL STATES

The AMY collaboration Ho, Y.H. ; Kurihara, Y. ; Omori, T. ; et al.

Phys.Lett.B 244 (1990) 573-579, 1990.

Inspire Record 294829 DOI 10.17182/hepdata.51362

We report results of a study of four-lepton final states produced in e + e − collisions at center-of-mass energies from 50 to 61.4 GeV using the AMY detector at the TRISTAN collider. For the cases where two or three charged tracks are produced at large angles relative to the beam direction, the cross sections agree with QED. However, we observe an excess of e + e − → e + e − μ + μ − events with four tracks at wide angles and with dimuon mass less than 1.0 GeV / c 2 .

1 data table

Table 1

No description provided.

Precision Measurement of the Muon Momentum in Pion Decay at Rest

Daum, M. ; Eaton, G.H. ; Frosch, R. ; et al.

Phys.Lett.B 74 (1978) 126-129, 1978.

Inspire Record 122405 DOI 10.17182/hepdata.27473

A precision measurement of the μ + momentum in π + decay at rest has been made with a magnetic spectrometer. The result is p μ + = (29.7873 ± 0.0014) MeV/c. The consequences of thisresult for the rest masses of the muon neutrino and of the positive pion are discussed.

2 data tables

Table 1

DECAY AT REST WAS STUDIED.

Table 2

No description provided.

New Determination of the Upper Limit for the Muon Neutrino Mass

Daum, M. ; Dubal, L. ; Eaton, G.H. ; et al.

Phys.Lett.B 60 (1976) 380-384, 1976.

Inspire Record 112895 DOI 10.17182/hepdata.27715

We have measured the muon momentum in pion decay at rest using a magnetic spectrometer. From the result, p μ + = (29.787±0.005) MeV/ c , we deduce a squared muon neutrino mass of (0.23±0.54) MeV 2 / c 4 .

1 data table

Table 1

No description provided.

Inclusive Characteristics of $\pi^-$ Mesons Produced in $p$ C and $p$ Ta Interactions at 10-{GeV}/$c$ Proton Momentum

Armutliisky, D.D. ; Akhababian, N.O. ; Grishin, V.G. ; et al.

Sov.J.Nucl.Phys. 48 (1988) 101-107, 1988.

Inspire Record 251090 DOI 10.17182/hepdata.9502

None

8 data tables

Table 1

No description provided.

Table 2

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Table 3

MOMENTUM SPECTRA IN THE WINDOW P=0.1-6.0 HAVE BEEN FITTED BY THE FORMULA: (1/N)*D(N)/D(P)=CONST(Q=1)*EXP(-SLOPE(Q=1)*P)+CONST(Q=2)*EXP (-SLOPE(Q=2)*P).

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Comparative Characteristics of Central and Noncentral C C Interactions at 4.2-{GeV} Per Nucleon

Agakishiev, G.N. ; Backovic, S. ; Boldea, V. ; et al.

Sov.J.Nucl.Phys. 51 (1990) 481-485, 1990.

Inspire Record 285507 DOI 10.17182/hepdata.17258

None

5 data tables

Table 1

No description provided.

Table 2

No description provided.

Table 3

P - IS PROTON-PARTICIPANTS, ITS NUMBER WAS DEFINED AS FOLLOWS: N(P)=N+ - N - N(S,P) - N(S,T), WHERE N+ , N- - NUMBER OF MULT(CHARGED) PARTICLES WITH Z=+1 AND Z=-1, N(S,P), N(S,T) - NUMBER OF STRIPPING PARTICLES WITH Z=1 FROM PROJECTILE (P>3 GEV, THETA<4 DEG) AND TARGET (P<0.3 GEV FOR PROTONS).

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On the role of rescattering in the production of particles with large transverse momentum in pi- A interactions at 38-GeV/c.

The RISK collaboration Akhobadze, K.G. ; Bannikov, A.V. ; Boos, E.G. ; et al.

Sov.J.Nucl.Phys. 52 (1990) 662-665, 1990.

Inspire Record 299247 DOI 10.17182/hepdata.17239

None

6 data tables

Table 1

No description provided.

Table 2

No description provided.

Table 3

PT(P=3,NAME=OUT)**2 - MEAN SQUARE OF THE PROJECTION OF THE ASSOCIATED PARTICLE TRANSVERSE MOMENTUM ONTO THE NORMAL TO THE TRIGGER PARTICLE PRODUCTION PLANE.

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Characteristics of the pion production and proton emission processes in proton - carbon nuclear collisions at 4.2-GeV/c momentum

Strugalski, Z. ; Sultanov, M. ;

JINR-E1-92-68, 1992.

Inspire Record 336351 DOI 10.17182/hepdata.39402

None

12 data tables

Table 1

No description provided.

Table 2

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Table 3

No description provided.

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Multiplicity, Momentum and Angular Characteristics of $\pi^-$ Mesons for $p$ C, $d$ C, $\alpha$ C and C C Interactions at 4.2-{GeV}/$c$ Per Nucleon

The Alma Ata-Baku-Belgrade-Bucharest-Dubna-Kishinev-Leipzig- Moscow-Prague-Samarkand-Sofiya-Tashkent-Tbilisi-Ulan Bator-Varna collaboration Agakishiev, G.N. ; Akhababian, N. ; Armutliisky, D. ; et al.

Z.Phys.C 27 (1985) 177, 1984.

Inspire Record 203342 DOI 10.17182/hepdata.1999

Light ion collisions with carbon target at 4.2 GeV/c/N are studied. Pion multiplicity distributions, momentum and angular spectra are analysed. These data are described in terms of models assuming independent interactions of nucleons from the projectile nucleus with the target.

18 data tables

Table 1

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Table 3

No description provided.