Derkaoui, J.
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Collective excitation of Delta isobar in the charge exchange reactions (Li-7, Be-7) and (H-3, He-3) at a momentum of 3-GeV/c/nucleon

Avramenko, S.A. ; Abdurakhimov, A.U. ; Aksinenko, V.D. ; et al.
JETP Lett. 55 (1992) 707-712, 1992.
Inspire Record 346156 DOI 10.17182/hepdata.16833

None

2 data tables
Table 1

No description provided.

Table 2

No description provided.


Narrow baryonia with open and hidden strangeness.

The EXCHARM collaboration Aleev, A.N. ; Balandin, V.P. ; Chvyrov, A.S. ; et al.
Phys.Atom.Nucl. 56 (1993) 1358-1366, 1993.
Inspire Record 344917 DOI 10.17182/hepdata.17233

None

4 data tables
Table 1

NUCLEUS IS P, C, AL, CU.

Table 2

NUCLEUS IS P, C, AL, CU.

Table 3

NUCLEUS IS P, C, AL, CU.

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Electroproduction of pi0 on the proton near threshold

Welch, T.P. ; Karen, P.H. ; Mitchell, J.H. ; et al.
Phys.Rev.Lett. 69 (1992) 2761-2764, 1992.
Inspire Record 344040 DOI 10.17182/hepdata.19808

The electroproduction of π0 on the proton was measured from 0 to 2.5 MeV above threshold for virtual-photon 4-momenta of -0.05 and -0.1 (GeV/c)2. The sum of the lowest-order contributing multipoles, a0=‖E0+‖2-εL‖L0+‖2, was determined with a precision an order of magnitude better than previously possible. Our results for a0 are consistent with present calculations. Our extracted value for ‖L0+‖2 at the ‘‘photon point’’ is in agreement with recent predictions.

1 data table
Table 1

Joined statistics for two incident electron energy of 300 and 500 MeV.


Precise Measurement of the $\Xi^-$ Magnetic Moment

Duryea, J. ; Guglielmo, G. ; Heller, Kenneth J. ; et al.
Phys.Rev.Lett. 68 (1992) 768-771, 1992.
Inspire Record 335825 DOI 10.17182/hepdata.19850

With 4.36×106 events, spin precession in a magnetic field has been used to measure the magnetic moment of the Ξ− hyperon as -0.6505±0.0025 nuclear magnetons.

1 data table
Table 1

No description provided.


Measurements at 0-degrees of negatively charged particles and anti-nuclei produced in collision of 14.6-A/GeV/c Si on Al, Cu, and Au targets

Aoki, M. ; Beatty, J. ; Beavis, D. ; et al.
Phys.Rev.Lett. 69 (1992) 2345-2348, 1992.
Inspire Record 344921 DOI 10.17182/hepdata.19827

We report measurements of d¯, p¯, K−, and π− produced at 0° in collisions of 14.6A GeV/c Si28 on Al, Cu, and Au targets. A beam-line focusing spectrometer was used to identify particles at rigidities from -2 to -8 GV. The ratio of d¯/p¯ invariant cross sections at midrapidity (y=1.7) is (1±0.7)×10−5, larger than expected from a calculation of dd¯ direct production but smaller than predicted by a simple coalescence model. We also report limits on the production of exotic particles.

10 data tables
Table 1

No description provided.

Table 2

No description provided.

Table 3

No description provided.

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Measurement of B0 anti-B0 mixing at the Fermilab Tevatron collider

The CDF collaboration Abe, F. ; Amidei, Dante E. ; Apollinari, G. ; et al.
Phys.Rev.Lett. 67 (1991) 3351-3355, 1991.
Inspire Record 332810 DOI 10.17182/hepdata.19881

The B0 B¯ 0 average mixing parameter χ has been extracted from eμ and ee events produced in pp¯ collisions at √s =1.8 TeV. In a sample of 900 eμ events, the like-sign to opposite-sign charge ratio R is measured to be 0.556±0.048(stat)−0.042+0.035(syst). In the absence of mixing, the expected value of R would be 0.23±0.06. The corresponding number for 212 ee events is 0.573±0.116(stat)±0.047(syst) with an expected nonmixing value of 0.24±0.07. The observed excess in R leads to a combined determination of χ=0.176±0.031(stat+syst) ±0.032 (model), where the last uncertainty is due to Monte Carlo modeling.

2 data tables
Table 1

No description provided.

Table 2

No description provided.


Shadowing in the muon-xenon inelastic scattering cross-section at 490-GeV

The Fermilab E665 collaboration Adams, M.R. ; Aid, S. ; Anthony, P.L. ; et al.
Phys.Lett.B 287 (1992) 375-380, 1992.
Inspire Record 341389 DOI 10.17182/hepdata.29153

Inelastic scattering of 490 GeV μ + from deuterium and xenon nuclei has been studied for x Bj > s .001. The ratio of the xenon/deuterium cross section per nucleon is observed to vary with x Bj , with a depletion in the kinematic range 0.001 < x Bj < 0.025 which exhibits no significant Q 2 dependence. An electromagnetic calorimeter was used to verify the radiative corrections.

2 data tables
Table 1

Xenon structure function parameterized as being equal to the DEUT structurefunction.

Table 2

Xenon structure function parameterized by an x-dependent shadowing factor times the DEUT structure function.


A Measurement of the B meson and b quark cross-sections at s**(1/2) = 1.8-TeV using the exclusive decay B+- ---> J / psi K+-

The CDF collaboration Abe, F. ; Amidei, Dante E. ; Apollinari, G. ; et al.
Phys.Rev.Lett. 68 (1992) 3403-3407, 1992.
Inspire Record 333080 DOI 10.17182/hepdata.19852

This letter reports the full reconstruction of B mesons through the decay chain B±→J/ψ K±, J/ψ→μ+μ−, using data obtained at the Collider Detector at Fermilab in p¯p collisions at √s =1.8 TeV. This exclusive sample, the first observed at a hadron collider, is then used to measure the B-meson cross section, from which we extract the b-quark cross section. We obtain σ=2.8±0.9 (stat) ±1.1(syst) μb for B− mesons with PT>9.0 GeV/c and rapidity ‖y‖<1.0. We obtain σ=6.1±1.9(stat) ±2.4(syst) μb, for b quarks with transverse momentum PT>11.5 GeV/c and rapidity ‖y‖<1.0.

2 data tables
Table 1

B-meson cross section.

Table 2

B-quark cross section.


Formation of light fragments of oxygen nucleus in O-16 p interactions at momentum 3.1-A/GeV/c

Ameeva, B.U. ; Botvina, A.S. ; Buzdavina, N.A. ; et al.
JINR-P1-91-545, 1991.
Inspire Record 324204 DOI 10.17182/hepdata.38628

None

22 data tables
Table 1

No description provided.

Table 2

No description provided.

Table 3

No description provided.

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A Measurement of the b anti-b forward backward asymmetry using the semileptonic decay into muons

The DELPHI collaboration Abreu, P. ; Adam, W. ; Adami, F. ; et al.
Phys.Lett.B 276 (1992) 536-546, 1992.
Inspire Record 322498 DOI 10.17182/hepdata.29264

The forward-backward asymmetry of bottom quarks is measured with statistics of approximately 80 000 hadronic Z 0 decays produced in e + e − collisions at a centre of mass energy of √ s ≈ M z . The tagging of b quark events has been performed using the semileptonic decay channel b→X+ μ . Because the asymmetry depends on the weak coupling, this leads to a precise measurement of the electroweak mixing angle sin 2 θ w . The experimental result is A FB b = 0.115±0.043(stat.)±0.013(syst.). After correcting the value for the B 0 B 0 mixing this becomes A FB b =0.161±0.060(stat.)±0.021(syst.) corresponding to sin 2 θ W MS =0.221±0.011( stat. )±0.004( syst. ) .

3 data tables
Table 1

Experimentally measured asymmetry.

Table 2

Asymmetry corrected for mixing using mixing parameter 0.143 +- 0.023.

Table 3

SIN2TW measured in MSBAR scheme.