Date

MEASUREMENT OF THE BJORKEN X AND Y DISTRIBUTIONS IN NEUTRAL AND CHARGED CURRENT muon-neutrino INTERACTIONS

Baltay, C. ; Bregman, M. ; Caroumbalis, D. ; et al.
Phys.Rev.Lett. 52 (1984) 1948-1951, 1984.
Inspire Record 205295 DOI 10.17182/hepdata.20446

Distributions of the Bjorken scaling variables x and y, and the structure function F+(x), are presented both for neutral-current and for charged-current νμ interactions. The data were obtained by use of the Fermilab 15-ft neon bubble chamber exposed to a narrow-band νμ beam. Results are based on 151 neutral-current and 683 charged-current events. An important feature of the neutral-current analysis is the event-by-event reconstruction of the outgoing neutrino.

3 data tables

No description provided.

DATA REQUESTED FROM C.BALTAY ON 20/9/91.

DATA REQUESTED FROM C.BALTAY ON 20/9/91.


Upper Limits on the Production Rate of the Decuplet Baryons $\Delta$ and $\Sigma^*$ in $e^+ e^-$ Annihilation at 34.4-{GeV}

The TASSO collaboration Althoff, M. ; Braunschweig, W. ; Kirschfink, F.J. ; et al.
Z.Phys.C 26 (1984) 181, 1984.
Inspire Record 203142 DOI 10.17182/hepdata.16197
2 data tables

UPPER LIMITS FOR DEL(1232)++ PRODUCTION.

UPPER LIMITS FOR SIG(1385)+- PRODUCTION.


Measurement of the Proton - anti-Proton Total and Elastic Cross-Sections at the CERN SPS Collider

The UA4 collaboration Bozzo, M. ; Braccini, P.L. ; Carbonara, F. ; et al.
Phys.Lett.B 147 (1984) 392-398, 1984.
Inspire Record 203148 DOI 10.17182/hepdata.49643

The proton-antiproton total cross section was measured at the CM energy √s = 546 GeV . The result is σ tot = 61.9± 1.5 mb . The ratio of the elastic to the total cross section is σ e ℓ / σ tot = 0.215±0.005. A comparison to the lower energy data shows that the increase of the total cross section with energy is very close to a log 2 s behaviour.

2 data tables

CROSS SECTIONS ASSUMING RHO = 0.15.

RATIO OF ELASTIC TO TOTAL CROSS SECTION.


The Production and Decay of Tau Leptons in $e^+ e^-$ Annihilation at {PETRA} Energies

The TASSO collaboration Althoff, M. ; Braunschweig, W. ; Kirschfink, F.J. ; et al.
Z.Phys.C 26 (1985) 521, 1985.
Inspire Record 205120 DOI 10.17182/hepdata.16121

We have observed τ pair production at average CM energies of 13.9, 22.3, 34.5 and 43.1 GeV. The cross-sections are consistent with QED, the cut off parameters beingΛ+>161 GeV andΛ−169 GeV (95% CL). The topological branching fraction of the τ to 1 charged particle,B1, is 0.847±0.011 (stat)−0.013+0.016(syst) and no decays to 5 charged particles were observed resulting inB5<0.007 (95% CL). Within the 3 charged track final stateB(τ−→π−π+π−v)/(B(τ−→π−π+π−v)+B(τ−→π−π+π−π0v))=0.37−0.20+0.35

2 data tables

No description provided.

No description provided.


A Detailed Study of Strange Particle Production in $e^+ e^-$ Annihilation at High-energy

The TASSO collaboration Althoff, M. ; Braunschweig, W. ; Kirschfink, F.J. ; et al.
Z.Phys.C 27 (1985) 27, 1985.
Inspire Record 205119 DOI 10.17182/hepdata.16068

Results onK0 and Λ production ine+e− annihilation at c.m. energies of 14, 22 and 34 GeV are presented. The shape of theK0 and Λ differential cross sections are very similar to each other and to those of π±,K± and\(p(\bar p)\). Scaling violations are observed forK0 production. We obtain a value for the probability to produce strange quark-antiquark pairs relative to that to produce up or down quark-antiquark pairs of 0.35±0.02±0.05. The value ofRh=σ(e+e-→hX)/σµµ is shown to rise steadily with c.m. energy for all particle species. At 34 GeV we find 1.48±0.05K0 and 0.31±0.03 Λ per event. We have searched for possible Λ polarization. The production ofK0's and Λ's in jets is examined as a function ofpT2 and rapidity and compared to that of all charged particles; the yields in two and three jets are also investigated. Results are presented from events with two baryons\((\Lambda ,\bar \Lambda ,por\bar p)\) observed.

18 data tables

No description provided.

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INVESTIGATION OF INCLUSIVE PROCESSES pi- A ---> pi- X AND pi- A ---> p (backwards) X AT 40-GeV/c

Abrosimov, A.T. ; Albini, E. ; Antipov, V.V. ; et al.
JINR-E1-84-703, 1984.
Inspire Record 209961 DOI 10.17182/hepdata.39513

None

3 data tables

No description provided.

No description provided.

No description provided.


CHARM PRODUCTION IN NEUTRON NUCLEON INTERACTIONS

Tzeng, L. ; Mcbride, P.L. ; Cooper, P.S. ; et al.
Phys.Rev.Lett. 55 (1985) 1172-1175, 1985.
Inspire Record 221439 DOI 10.17182/hepdata.20303

Hadronic production of charmed particles in association with muons from their semileptonic decay has been observed in a high-resolution streamer-chamber experiment performed at Fermilab. A miss-distance analysis of the pictures gives a signal of 17.3±4.7 events. Depending on the production model this corresponds to a range of neutron-nucleon cross sections from 8 to 50 μb, assuming an A23 dependence.

2 data tables

NEUTRON BEAM : 280 GEV - AVERAGE ENERGY, PEAKED AT 320 GEV WITH FWHW OF 130 GEV.

NEUTRON BEAM : 280 GEV - AVERAGE ENERGY, PEAKED AT 320 GEV WITH FWHW OF 130 GEV.


INVESTIGATION OF INCLUSIVE PROCESSES pi- A ---> p (backwards) X AT 40-GeV/c

Albini, E. ; Antipov, V.V. ; Bellini, G. ; et al.
Sov.J.Nucl.Phys. 43 (1986) 585, 1986.
Inspire Record 215986 DOI 10.17182/hepdata.9916

None

3 data tables

No description provided.

No description provided.

No description provided.


Elastic Scattering at the {CERN} {SPS} Collider Up to a Four Momentum Transfer of 1.55-{GeV}**2

The UA4 collaboration Bozzo, M. ; Braccini, P.L. ; Carbonara, F. ; et al.
Phys.Lett.B 155 (1985) 197-202, 1985.
Inspire Record 213385 DOI 10.17182/hepdata.30410

Proton-antiproton elastic scattering was measured at the center-of-mass energy s =546 GeV in the four-momentum transfer range 0.45⩽−⩽1.55GeV 2 . The shape of the t -distribution is quite different from that observed in proton-proton scattering at the ISR. Rather than a dip-bump structure, a kink is present at − ≈0.9GeV 2 followed by a shoulder. The cross section at the second maximum is more than one order of magnitude higher than at the ISR.

1 data table

No description provided.


Charm Hadron Properties in 360-GeV/c $\pi^-$ p-Interactions

The LEBC-EHS collaboration Aguilar-Benitez, M. ; Allison, W.W.M. ; Bailly, J.L. ; et al.
Z.Phys.C 31 (1986) 491-511, 1986.
Inspire Record 214935 DOI 10.17182/hepdata.15883

A study of the properties of charm particles produced in 360 GeV/c π-p interactions is reported. The experiment was performed using the high resolution hydrogen bubble chamber LEBC in association with the European Hybrid Spectrometer at the CERN SPS. Details of the exposure and operation of the spectrometer are given and the methods used to extract the charm data are presented. The essential physics results on the decay properties (lifetime, branching ratios) as well as on the hadroproduction properties (cross sections forD,\(\bar D\),F, Λc,D, correlations between charm particles) are given.

2 data tables

No description provided.

No description provided.