HEPData Search

Showing 8 of 278 results

Upsilon production in p anti-p collisions at s**(1/2) = 1.8-TeV

The CDF collaboration Abe, F. ; Albrow, M.G. ; Amendolia, S.R. ; et al.

Phys.Rev.Lett. 75 (1995) 4358, 1995.

Inspire Record 398187 DOI 10.17182/hepdata.42349

We report on measurements of the ϒ(1S), ϒ(2S), and ϒ(3S) differential, (d2σdPtdy)y=0, and integrated cross sections in pp¯ collisions at s=1.8 TeV using a sample of 16.6 ± 0.6 pb−1 collected by the Collider Detector at Fermilab. The three resonances were reconstructed through the decay ϒ→μ+μ−. Comparison is made to a leading order QCD prediction.

7 data tables

Table 1

SIG*Br(UPSI --> MU+ MU-).

Table 2

SIG*Br(UPSI --> MU+ MU-).

Table 3

SIG*Br(UPSI --> MU+ MU-).

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Vector boson production in hadron nuclear collisions. FNAL-597 experiment

Walker, W.D. ; Whitmore, J. ; Toothacker, W.S. ; et al.

Phys.Lett.B 255 (1991) 155-158, 1991.

Inspire Record 317003 DOI 10.17182/hepdata.29509

We report a search for the production of light quark vector bosons in hadron-nucleus collisions at 100 GeV bombarding energy. We find surprisingly few of these resonances produced. The lack of these particles is though to be due to the absorption by the many modestly energetic nucleons and the few anti-nucleons in the final state.

3 data tables

Table 1

No description provided.

Table 2

No description provided.

Table 3

No description provided.

W boson + jet angular distribution in p anti-p collisions at s**(1/2) = 1.8-TeV

The CDF collaboration Abe, F. ; Albrow, M.G. ; Amidei, D. ; et al.

Phys.Rev.Lett. 73 (1994) 2296-2300, 1994.

Inspire Record 374152 DOI 10.17182/hepdata.42492

The W+jet angular distribution is measured using W→eν events recorded with the Collider Detector at Fermilab (CDF) during the 1988-89 and 1992-93 Tevatron runs. The data agree well with both a leading order and a next-to-leading order theoretical prediction. The shape of the angular distribution is similar to that observed in photon + jet data and significantly different from that observed in dijet data.

2 data tables

Table 1

Data normalized to 1 in the cos(theta) range -0.6 to 0.6.

Table 2

Data normalized to 1 in the abs(cos(theta)) range <0.3.

Z gamma production and limits on anomalous Z Z gamma and Z gamma gamma couplings in panti-p collisions at s**(1/2) = 1.96- TeV

The D0 collaboration Abazov, V.M. ; Abbott, B. ; Abolins, M. ; et al.

Phys.Lett.B 653 (2007) 378-386, 2007.

Inspire Record 750351 DOI 10.17182/hepdata.52512

We present a study of eegamma and mumugamma events using over 1 fb-1 of data collected with the D0 detector at the Fermilab Tevatron ppbar Collider at sqrt(s) = 1.96 TeV. Having observed 453 (515) candidates in the eegamma (mumugamma) final state, we measure the Zgamma production cross section for a photon with transverse energy ET > 7 GeV, separation between the photon and leptons Delta R(lgamma} > 0.7, and invariant mass of the di-lepton pair M(ll) > 30 GeV, to be 4.96 +/- 0.30(stat. + syst.) +/- 0.30(lumi.) pb, in agreement with the standard model prediction of 4.74 +/- 0.22 pb. This is the most precise Zgamma cross section measurement at a hadron collider. We set limits on anomalous trilinear Zgammagamma and ZZgamma gauge boson couplings of -0.085 < h(30)^(gamma) < 0.084, -0.0053 < h(40)^(gamma) < 0.0054 and -0.083 < h(30)^(Z) < 0.082, -0.0053 < h(40)^(Z) < 0.0054 at the 95% C.L. for the form-factor scale Lambda = 1.2 TeV.

1 data table

Table 1

Measured cross section for Z0 GAMMA production. Error contains both statistics and systematics (excluding luminosity uncertainty).

rivet Analysis
a_1(1260) dominance in the process e+e- \to 4\pi at energies 1.05--1.38 GeV

The CMD-2 collaboration Akhmetshin, R.R. ; Anashkin, E.V. ; Arpagaus, M. ; et al.

Phys.Lett.B 466 (1999) 392-402, 1999.

Inspire Record 483994 DOI 10.17182/hepdata.50145

First results of the study of the process e+e- \to 4\pi by the CMD-2 collaboration at VEPP-2M are presented for the energy range 1.05--1.38 GeV. Using an integrated luminosity of 5.8 pb^{-1}, energy dependence of the processes e+e- \to \pi^+\pi^- 2\pi^0 and e+e- \to 2\pi^+ 2\pi^- has been measured. Analysis of the differential distributions demonstrates the dominance of the a_1\pi and \omega\pi intermediate states. Upper limits for the contributions of other alternative mechanisms are also placed.

3 data tables

Table 1

Energy dependence of the cross section for the 2PI+ 2PI- final state. Statistical errors only.

Table 2

Energy dependence of the cross section for the PI+ PI- 2PI0 final state. Statistical errors only.

Table 3

Energy dependence of the cross section for the OMEGA PI0 final state. Statistical errors only.