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Analysis of the Highest Transverse Energy Events Seen in the UA1 Detector at the S $p \bar{p}$ S Collider

The UA1 collaboration Albajar, C. ; Albrow, M.G. ; Allkofer, O.C. ; et al.

Z.Phys.C 36 (1987) 33, 1987.

Inspire Record 248074 DOI 10.17182/hepdata.15751

This is the first full solid angle analysis of large transverse energy events in$p\bar p$ collisions at the CERN collider. Events with transverse energies in excess of 200 GeV at$\sqrt s= 630 GeV$ are studied for any non-standard physics and quantitatively compared with expectations from perturbative QCD Monte Carlo models. A corrected differential cross section is presented. A detailed examination is made of jet profiles, event jet multiplicities and the fraction of the transverse energy carried by the two jets with the highest transverse jet energies. There is good agreement with standard theory for events with transverse energies up to the largest observed values$( \approx \sqrt {s/2} )$ and the analysis shows no evidence for any non-QCD mechanism to account for the event characteristics.

1 data table match query

Table 1

No description provided.

Study of Heavy Flavor Production in Events With a Muon Accompanied by Jet(s) at the {CERN} Proton - Anti-proton Collider

The UA1 collaboration Albajar, C. ; Albrow, M.G. ; Allkofer, O.C. ; et al.

Z.Phys.C 37 (1988) 489-503, 1988.

Inspire Record 250762 DOI 10.17182/hepdata.15677

We present a study of heavy flavour (charm and beauty) production using data collected with the UA1 detector at the CERN Proton-Antiproton collider at a centre-of-mass energy of 630 GeV for an integrated luminosity of 556 nb−1. This follows our earlier study ofb$\bar b$ andc$\bar c$ production in dimuon events and the evidence for mixing betweenB0 and$\bar B^0 $ states. Properties of an inclusive sample of events containing a muon withpT>6 GeV/c are compared with QCD predictions for heavy flavour production, using the ISAJET Monte Carlo program. The predicted largepT muon yield from heavy flavour production and decay agrees with the data to within 30%. For events with a muon ofpT>10 GeV/c and at least one jet withET>10 GeV, we measure the ratio charm/(charm+beauty) to be (24±8±9)%. We also show that the correlations observed between the two heavy quark jets expected by flavour conservation are consistent with the mixture of lowest and higher order QCD processes. We study in detail the topological and kinematic properties of a subsample of events containing a highpT muon and one or more jets. The good agreement of the theoretical predictions with our data in a region dominated by the production of charm and beauty shows that one of the main background sources to a new heavy quark signature is well understood.

3 data tables match query

Table 1

No description provided.

Table 2

Numerical values supplied by K.Wacker. Muon spectrum with at least one jet with PT > 12 GeV/c.

Table 3

No description provided.

Studies of Intermediate Vector Boson Production and Decay in {UA1} at the {CERN} Proton - Antiproton Collider

The UA1 collaboration Albajar, C. ; Albrow, M.G. ; Allkofer, O.C. ; et al.

Z.Phys.C 44 (1989) 15-61, 1989.

Inspire Record 267170 DOI 10.17182/hepdata.15015

An extensive study of production and decay properties of charged and neutral Intermediate Vector Bosons (IVB) at the CERN proton-antiproton collider is presented. Intermediate Vector Bosons were detected in the electron, muon, and tau decay modes at centre-of-mass energies of 0.546 and 0.630 TeV. This paper is a summary, based on all the available data from the UA1 experiment from the running periods 1982–1985. Results are presented and compared with expectations of the Standard Eletroweak Model and QCD-improved Drell-Yan annihilation processes. The general conclusion is that there is an excellent agreement between the predictions of the Standard Model and our measurements.

5 data tables match query

Table 1

No description provided.

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No description provided.

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Evidence for the Existence of a New Vector Meson of Mass 1.82-GeV Observed in e+ e- Annihilations at ADONE

Bernabei, R. ; d'Angelo, S. ; Esposito, B. ; et al.

Phys.Lett.B 68 (1977) 389-392, 1977.

Inspire Record 119878 DOI 10.17182/hepdata.27563

Evidence is presented for the occurrence in e + e − annihilation of a new vector meson of mass 1821 ± 16 MeV and Γ = 31 ± 15 MeV.

1 data table match query

Table 1

MULTIHADRON EVENTS (AT LEAST THREE CHARGED TRACKS WITH ZERO OR MORE PHOTONS) PER UNIT LUMINOSITY.

Momentum Analysis of Kaon and Pion Pairs Produced from Timelike Photons at 1.6-GeV Energy

Esposito, B. ; Felicetti, F. ; Marini, A. ; et al.

Phys.Lett.B 67 (1977) 239-242, 1977.

Inspire Record 124109 DOI 10.17182/hepdata.27574

We present results for the total cross section of e + e − annihilation into two hadrons at 1.6 GeV: σ ππ = σ KK = (1.8 ± 1.1) × 10 -33 cm 2 .From these values we obtain the time-like electromagnetic form factors these mesons: | F π | 2 = 0.24 ± 0.14 and | F K | 2 = 0.46 ± 0.26.

1 data table match query

Table 1

No description provided.

Search for Narrow Resonances in e+ e- Annihilation Into Hadrons at ADONE

Bartoli, B. ; Bisello, D. ; Esposito, B. ; et al.

Phys.Lett.B 58 (1975) 478-480, 1975.

Inspire Record 100116 DOI 10.17182/hepdata.27782

A search for narrow resonances in the reaction e + e − → hadrons in the mass regions 1915–2345 MeV and 2970–3090 MeV has been perforned at ADONE, the Frascati storage ring. With 90% confidence level our data exclude the production of narrow resonances with integrated cross section larger than 20% of the integrated cross section for production of the J/Ψ (3100 MeV).

1 data table match query

Table 1

No description provided.