Subthreshold K+ production in heavy ion collisions

Julien, J. ; Lebrun, D. ; Mougeot, A. ; et al.
Phys.Lett.B 264 (1991) 269-273, 1991.
Inspire Record 304290 DOI 10.17182/hepdata.29376

The cross section for K + meson production in collisions of 36 Ar ions on a 48 Ti target has been measured at an incident energy of 92 MeV per nucleon. A description of the experimental set-up is given. Twelve events attributed to monoenergetic muons following the decay of stopped kaons have been identified. From these events, one infers a production cross section of 240 pb. Data are briefly discussed.

1 data table

No description provided.


Kaon production in nucleus nucleus collisions at 92-MeV per nucleon.

Legrain, R. ; Lecolley, J.F. ; Lecolley, F.R. ; et al.
Phys.Rev.C 59 (1999) 1464-1471, 1999.
Inspire Record 450061 DOI 10.17182/hepdata.47065

K+ production far below the free nucleon-nucleon threshold has been investigated in collisions of 36Ar on 12C, natTi, and 181Ta targets at an incident energy of 92 MeV per nucleon. The cross sections for K+ production have been inferred from the observed muon decays of positive kaons. The results are discussed in the framework of a participant-spectator model and are compared to proton induced K+ production and to subthreshold pion production experiments.

1 data table

Three different production modes are assumed: (C=ISOTROPIC) isotropic emmision inthe lab frame with a kinetic energy EKIN(K) = 35 MeV, (C=SPECTRUM) isotropic emmision inthe lab frame with a kinetic energy spectrum from S. Gosh, PR C45,R518, (C=FIREBALL) isotropic emmision in the fireball frame with a kinetic ener gy EKIN(K) = 35 MeV.


A Measurement of $\Lambda_{\overline{MS}}$ from $\nu_{\mu}$ - Fe Nonsinglet Structure Functions at the Fermilab Tevatron

Quintas, P.Z. ; Leung, W.C. ; Mishra, S.R. ; et al.
Phys.Rev.Lett. 71 (1993) 1307-1310, 1993.
Inspire Record 336860 DOI 10.17182/hepdata.19733

The CCFR Collaboration presents a measurement of scaling violations of the nonsinglet structure function and a comparison to the predictions of perturbative QCD. The value of ΛQCD, from the nonsinglet evolution with Q2>15 GeV2 and in the modified minimal-subtraction renormalization scheme, is found to be 210±28(stat)±41(syst) MeV.

1 data table

The CONST(N=LAMBDA-QCD) is extracted from the measurement of scaling violations of the nonsinglet structure function.


Measurement of the strange sea distribution using neutrino charm production

Rabinowitz, S.A. ; Arroyo, C. ; Bachmann, K.T. ; et al.
Phys.Rev.Lett. 70 (1993) 134-137, 1993.
Inspire Record 354524 DOI 10.17182/hepdata.19779

A high-statistics study by the Columbia-Chicago-Fermilab-Rochester Collaboration of opposite-sign dimuon events induced by neutrino-nucleon scattering at the Fermilab Tevatron is presented. A sample of 5044 νμ and 1062 ν¯μ induced μ∓μ± events with Pμ1≥9 GeV/c, Pμ2≥5 GeV/c, 30≤Eν≤600 GeV, and 〈Q2〉=22.2 GeV2/c2 is observed. The data support the slow-rescaling model of charm production with a value of mc=1.31±0.24 GeV2/c2. The first measurement of the Q2 dependence of the nucleon strange quark distribution xs(x) is presented. The data yield the Cabibbo-Kobayashi-Maskawa matrix element ‖Vcd‖=0.209±0.012 and the nucleon fractional strangeness content ηs=0.064−0.007+0.008.

4 data tables

From joined NUMU and NUMUBAR statictics.

From joined NUMU and NUMUBAR statictics.

From joined NUMU and NUMUBAR statictics.

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A Precise measurement of the weak mixing angle in neutrino nucleon scattering

The CCFR collaboration Arroyo, C. ; King, B.J. ; Bachmann, K.T. ; et al.
Phys.Rev.Lett. 72 (1994) 3452-3455, 1994.
Inspire Record 360411 DOI 10.17182/hepdata.37276

We report a precise measurement of the weak mixing angle from the ratio of neutral current to charged current inclusive cross-sections in deep-inelastic neutrino-nucleon scattering. The data were gathered at the CCFR neutrino detector in the Fermilab quadrupole-triplet neutrino beam, with neutrino energies up to 600 GeV. Using the on-shell definition, ${\rm sin ~2\theta_W} \equiv 1 - \frac{{\rm M_W} ~2}{{\rm M_Z} ~2}$, we obtain ${\rm sin ~2\theta_W} = 0.2218 \pm 0.0025 ({\rm stat.}) \pm 0.0036 ({\rm exp.\: syst.}) \pm 0.0040 ({\rm model})$.

1 data table

Using the on-shell definition, sin2tw = 1-Mw**2/Mz**2.. Analysis contained 475 627 events after all cuts.. The first systematic error is experimental, the second is theoretical.


Neutrino production of same sign dimuons at the Fermilab Tevatron

Sandler, P.H. ; Kinnel, T.S. ; Smith, W.H. ; et al.
Z.Phys.C 57 (1993) 1-12, 1993.
Inspire Record 32390 DOI 10.17182/hepdata.14493

The rate of neutrino- and antineutrino-induced prompt same-sign dimuon production in steel was measured using a sample of μ−μ− events and 25 μ+μ+ events withPμ>9 GeV/c, produced in 1.5 millionvμ and 0.3 million\(\overline {v_\mu}\) induced charged-current events with energies between 30 GeV and 600 GeV. The data were obtained with the Chicago-Columbia-Fermilab-Rochester (CCFR) neutrino detector in the Fermilab Tevatron Quadrupole Triplet Neutrino Beam during experiments E 744 and E 770. After background subtraction, the prompt rate of same-sign dimuon production is (0.53±0.24)×10−4 pervμ charged-current event and (0.52±0.33)×10−4 per\(\overline {v_\mu}\) charged-current event. The kinematic distributions of the same-sign dimuon events after background subtraction are consistent with those of the non-prompt background due to meson decays in the hadron shower of a charged-current event. Calculations ofc\(\bar c\) gluon bremsstrahlung, based on improved measurements of the charm mass parameter and nucleon structure functions by the CCFR collaboration, yield a prompt rate of (0.09±0.39)×10−4 pervμ charged-current event. In this case,c\(\bar c\) gluon bremsstrahlung is probably not an observable source of prompt same-sign dimuons.

2 data tables

Rate of dimuon production per charged current event.

Rate of dimuon production per charged current event.


Inverse Muon Decay, $\nu_\mu e \to \mu^- \nu_e$, at the Fermilab Tevatron

Mishra, S.R. ; Bachmann, K.T. ; Blair, R.E. ; et al.
Phys.Lett.B 252 (1990) 170-176, 1990.
Inspire Record 296115 DOI 10.17182/hepdata.15430

We report an improved measurement of the inverse muon decay process, ν μ +e→ μ − + ν e , at the Fermilab Tevatron. The rate of this reaction with respect to the ν μ -N charged current interaction is measured to be (0.1245±0.0057(stat.)±0.0031 (sys.)) × 10 −2 . The measurement confirms the standard model predictions for the Lorentz structure of the weak current, the helicity of the neutrino, and the energy dependence of the cross section.

4 data tables

Data from the Quadruple Triplet Neutrino beam (QTB).

Data from the Narrow Band Beam(NBB).

Weighted average of the QTB and NBB data.

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Inclusive Production of Nonstrange Mesons in anti-p p Annihilations

The Bombay-CERN-College de France-Madrid collaboration Hamatsu, R. ; Ganguli, S.N. ; Malhotra, P.K. ; et al.
Nucl.Phys.B 123 (1977) 189, 1977.
Inspire Record 111926 DOI 10.17182/hepdata.35452

A study of the inclusive production of π − , η , ϱ 0 , ω ad f mesons in p p annihilation at 0.7 GeV/ c is presented. Topological and channel cross sections are determined. Longitudinal and transversal momentum distributions of non-strange mesons are studied. It is deduced that nearly 48% of all negative pions arise from the decay of η , ϱ 0 , ω and f mesons.

2 data tables

No description provided.

No description provided.


The pi+ p interaction at 1.2 gev/c

Berthon, A. ; Mas, J. ; Narjoux, J.L. ; et al.
Nucl.Phys.B 81 (1974) 431-444, 1974.
Inspire Record 93412 DOI 10.17182/hepdata.7945

Experimental results are presented for the available channels in the 1.2 GeV/ c π + p interaction. An isobaric model with incoherent addition of the amplitudes is used to determine the π, Δ and N ∗ abundance rates in the π + π o p final state. The multipole parameters in the density matrix of the Δ ++ are determined as functions of its production angle.

7 data tables

No description provided.

LEGENDRE POLYNOMIAL FIT USED TO CORRECT FOR ELASTIC EVENTS LOST FROM THE FORWARD BIN.

No description provided.

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Study of the D (1285) and E(1420) Resonances Produced in anti-p p Annihilations at 700-MeV/c to 760-MeV/c

Nacasch, R. ; Defoix, C. ; Dobrzynski, L. ; et al.
Nucl.Phys.B 135 (1978) 203-223, 1978.
Inspire Record 122850 DOI 10.17182/hepdata.41975

In this paper we have investigated the properties of the D(1285) and E(1420) meson resonances using the five-body annihilation channels p p → K K πππ obtained in a large statistics experiment (28 events/μb). The analysis favours the 1 + spin-parity assignment for the D(1285) meson. The dominant decay mode of the D(1285) into K K π is found to be δ(970)π. The situation concerning the E(1420) meson remains confused although not inconsistent with previous analyses. Partial cross sections on resonance production are also presented.

1 data table

No description provided.