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Measurement of R($b$) at SLD

The SLD collaboration Etzion, Erez ;
(1996) 139-145, 1996.
Inspire Record 419721 DOI 10.17182/hepdata.18611

We report a new measurement of Rb=Gamma(Z -> bb)/ Gamma(Z -> hadrons) using a double tag technique where the b selection is based on topological reconstruction of the mass of the B-decay vertex. The measurement was performed using a sample of 150k hadronic Z0 events collected with the SLD at the SLAC Linear Collider during the years 1993-1995. The method utilizes the 3-D vertexing abilities of the SLD CCD pixel vertex detector and the small stable SLC beams to obtain a high b tagging efficiency of 37% for a purity of 97.2%. The high purity reduces the systematics introduced by charm contamination and correlations with Rc. We obtain a result of Rb=0.2176+/-0.0033(stat.)+/-0.0017(syst.)+/-0.0008(Rc). (Presented at the XXXIst Rencontres de Moriond Electroweak Interactions and Unified Theories, Les Arcs, Savoie, France, March 16-23, 1996.)

1 data table
Table 1

No description provided.


The Reaction d (polarized) p ---> He-3 pi0 near threshold

Nikulin, V.N. ; Boudard, A. ; Clajus, M. ; et al.
Phys.Rev.C 54 (1996) 1732-1740, 1996.
Inspire Record 421018 DOI 10.17182/hepdata.25833

Angular distributions for the differential cross section and three deuteron analyzing powers iT11, T20, and T22 of the reaction d→p→3Heπ0 have been measured over the whole angular domain at 20 energies close to threshold (0.03

1 data table
Table 1

No description provided.


Reaction cross-sections for 38, 65, and 97 MeV deuterons on targets from Be-9 to Pb-208

Auce, A. ; Carlson, R.F. ; Cox, A.J. ; et al.
Phys.Rev.C 53 (1996) 2919-2925, 1996.
Inspire Record 433953 DOI 10.17182/hepdata.25858

Reaction cross sections for deuterons have been measured for Be9, C12, O16, Si28, Ca40,48, Ni58,60, Sn112,116,120,124, and Pb208 at 37.9, 65.5, and 97.4 MeV. © 1996 The American Physical Society.

1 data table
Table 1

No description provided.


Relative and absolute neutron-induced fission cross-sections of Pb-208, Bi-209, and U-238 in the intermediate-energy region

Eismont, V.P. ; Prokofyev, A.V. ; Smirnov, A.N. ; et al.
Phys.Rev.C 53 (1996) 2911-2918, 1996.
Inspire Record 433954 DOI 10.17182/hepdata.25859

Measurements of neutron-induced fission cross sections for Pb208, Bi209, and U238 have been performed in the 70–160 MeV energy region at the neutron beam facility at the The Svedberg Laboratory in Uppsala using the Li7(p,n) reaction as neutron source. The fission fragments were detected by thin-film breakdown counters. The neutron flux was measured relative to the n-p scattering cross section with a proton-recoil spectrometer. The results are compared with calculations and with earlier reported experimental data. © 1996 The American Physical Society.

3 data tables
Table 1

No description provided.

Table 2

No description provided.

Table 3

No description provided.


Preliminary results of data handling at SIGMA-AYAKS experiment on search of dibaryons with separated color in pi Be interactions at momentum 43-GeV/c. (In Russian)

The SIGMA-AYAKS collaboration Kartasheva, V.G. ;
IFVE-96-45, 1996.
Inspire Record 428804 DOI 10.17182/hepdata.40525

None

2 data tables
Table 1

No description provided.

Table 2

No description provided.


Spin-parity analysis of eta pi0 pi0 system in pi- p charge exchange reaction at 100-GeV/c by Zemach method.

The GAMS collaboration Alde, D. ; Binon, F.G. ; Bricman, C. ; et al.
IFVE-96-39, 1996.
Inspire Record 425699 DOI 10.17182/hepdata.40710

None

1 data table
Table 1

No description provided.


Measurement of the gamma + D*+- cross-section in anti-p p collisions at s**(1/2) = 1.8-TeV

The CDF collaboration Abe, F. ; Akimoto, H. ; Akopian, A. ; et al.
Phys.Rev.Lett. 77 (1996) 5005-5010, 1996.
Inspire Record 420169 DOI 10.17182/hepdata.42264

We have measured the cross section of γ+D*± production in p¯p collisions at s=1.8TeV using the Collider Detector at Fermilab. In this kinematic region, the Compton scattering process (gc→γc) is expected to dominate and thus provide a direct link to the charm quark density in the proton. From the 45±18 γ+D*± candidates in a 16.4pb−1 data sample, we have determined the production cross section to be 0.38±0.15(stat)±0.11(syst) nb for the rapidity range |y(D*±)|<1.2 and |y(γ)|<0.9, and for the transverse momentum range pT(D*±)>6GeV/c and 16

1 data table
Table 1

No description provided.


rivet Analysis
A partial wave analysis of the reaction gamma gamma --> pi+ pi- pi0.

The ARGUS collaboration Albrecht, H. ; Hamacher, T. ; Hofmann, R.P. ; et al.
Z.Phys.C 74 (1997) 469-477, 1997.
Inspire Record 420421 DOI 10.17182/hepdata.44845

None

5 data tables
Table 1

Statistical errors only.

Table 2

Statistical errors only.

Table 3

Statistical errors only.

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Study of charged current e p interactions at Q**2 > 200-Gev**2 with the ZEUS detector at HERA

The ZEUS collaboration Derrick, M. ; Krakauer, D. ; Magill, S. ; et al.
Z.Phys.C 72 (1996) 47-64, 1996.
Inspire Record 420053 DOI 10.17182/hepdata.44714

Deep inelastic charged--current reactions have been studied in $e~+p$ and $e~-p$ collisions at a center of mass energy of about $300\,\gev$ in the kinematic region $Q~2\greater200\,\gev~2$ and $x\greater0.006$ using the ZEUS detector at HERA. The integrated cross sections for $Q~2\greater200\,\gev~2$ are found to be $\sigep=30.3\,{}~{+5.5}_{\mns4.2}\,{}~{+1.6}_{\mns2.6}\,{\rm pb}$ and $\sigem=54.7\,{}~{+15.9}_{\mns\chax 9.8}\,{}~{+2.8}_{\mns3.4}\,{\rm pb}$. Differential cross sections have been measured as functions of the variables $x$, $y$ and $Q~2$. From the measured differential cross sections $d\sigma/dQ~2$, the $W$ boson mass is determined to be $M_W=79\,{}~{+8} _{-7}{}~{+4}_{-4}\,\gev$. Measured jet rates and transverse energy profiles agree with model predictions. A search for charged--current interactions with a large rapidity gap yielded one candidate event, corresponding to a cross section of $\sigep(Q~2\greater200\,\gev~2;\eta_{\rm max}<2.5)=0.8\,{}_{-0.7}~ {+1.8}\,\pm0.1\,{\rm pb}$.

11 data tables
Table 1

No description provided.

Table 2

No description provided.

Table 3

No description provided.

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Measurement of D*+- production in two-photon processes at TRISTAN.

The AMY collaboration Takashimizu, N. ; Sasaki, T. ; Miyata, H. ; et al.
Phys.Lett.B 384 (1996) 96009331 481-486, 1996.
Inspire Record 419685 DOI 10.17182/hepdata.38328

The inclusive cross section for the production of charmed D∗± mesons in two-photon processes is measured with the AMY detector at the TRISTAN e+e− collider. D∗± mesons are identified from the distribution of charged-particle transverse momenta relative to the jet axis. A data sample corresponding to an integrated luminosity of 176 pb−1 at a center-of-mass energy of 58 GeV is used to determine a cross section σ(e+e− → e+e−D∗±X) = 270 ± 49(stat) ± 38(syst) pb. The results are compared with theoretical expectations based on the Vector Meson Dominance, direct quark-parton model, and resolved photon processes.

2 data tables
Table 1

No description provided.

Table 2

Reduced acceptance region to compare with the TOPAZ results.