Bernet, C
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Observation of Very Large Transverse Momentum Jets at the CERN anti-p p Collider

The UA2 collaboration Banner, M. ; Bloch, P. ; Bonaudi, F. ; et al.
Phys.Lett.B 118 (1982) 203-210, 1982.
Inspire Record 180797 DOI 10.17182/hepdata.30853

The distribution of total tranverse energy ΣE T over the pseudorapidity interval −1 < η < 1 and an azimuthal range Δφ =300° has been measured in the UA2 experiment at the CERN p p collider ( s = 540 GeV ) using a highly segmented total absorption caloriter. In the events with very large ΣE T (ΣE T ⪆60 GeV ) most of the transverse energy is found to be contained in small angular regions as expected for high transverse momentum hadron jets. We discuss the properties of a sample of two-jet events with invariant two-jet masses up to 140 GeV c 2 and we measure the cross section for inclusive jet production in the range of jet transverse momenta between 15 and 60 GeV c .

5 data tables
Table 1

No description provided.

Table 2

HERE ET IS ACTUALLY THE ENERGY-DENSITY=ET/DELTA OMEGA.

Table 3

No description provided.

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Transverse Momentum Spectra for Charged Particles at the CERN Proton anti-Proton Collider

The UA1 collaboration Arnison, G. ; Astbury, A. ; Aubert, Bernard ; et al.
Phys.Lett.B 118 (1982) 167-172, 1982.
Inspire Record 179520 DOI 10.17182/hepdata.30855

We have measured transverse momentum spectra up to 10 GeV/ c for charged particles produced centrally in proton-antiproton collisions at 540 GeV in the centre of mass at the CERN collider. Our results are compared with data at ISR energies and with the predictions of a QCD model. The charged particle spectrum shows a clear dependence on charged track multiplicity.

2 data tables
Table 1

No description provided.

Table 2

No description provided.


Measurement of the Proton - Anti-proton Elastic and Total Cross-section at a Center-of-mass Energy of 540-{GeV}

The UA4 collaboration Battiston, R. ; Bozzo, M. ; Braccini, P.L. ; et al.
Phys.Lett.B 117 (1982) 126-130, 1982.
Inspire Record 178898 DOI 10.17182/hepdata.30870

First results on the measurement of the elastic and total cross section at the CERN pp̄ Collider are presented. Combining the measurement of elastic scattering at low momentum transfer with the rate of inelastic interactions, a value of the total cross section of 66 mb with a 10% statistical error was obtained.

1 data table
Table 1

STATISTICAL ERROR ONLY.


First Results on Low Momentum Transfer Elastic Scattering at the {CERN} Proton - Anti-proton Collider

The UA4 collaboration Battiston, R. ; Bozzo, M. ; Braccini, P.L. ; et al.
Phys.Lett.B 115 (1982) 333-337, 1982.
Inspire Record 178576 DOI 10.17182/hepdata.30890

Proton-antiproton elastic scattering at a centre-of-mass energy of 540 GeV was measured in the four-momentum transfer range 0.05 < − t < s .19 GeV 2 . The t -distribution can be fitted by the exponential exp( b ) with b =17.2±1.0 GeV −2 . This result indicates a rapid decrease of the width of the diffraction peak between ISR and Collider energies.

2 data tables
Table 1

No description provided.

Table 2

EXPONENTIAL SLOPE OF FIT TO DN/DT IN REGION 0.05 <-T <0.19 GEV**-2.


Inclusive $\pi^0$ Production at the {CERN} $p \bar{p}$ Collider

The UA2 collaboration Banner, M. ; Bloch, P. ; Bonaudi, F. ; et al.
Phys.Lett.B 115 (1982) 59-64, 1982.
Inspire Record 178583 DOI 10.17182/hepdata.30880

Inclusive π 0 production has been measured at the CERN pp̄ collider, s =540 GeV , for 90° production angle and in a range of transverse momenta between 1.5 and 4.5 GeV/ c . The invariant production cross section is larger than that measured at s = 53 GeV for p-p collisions. The production of μ mesons aand of direct photons is also investigated.

1 data table
Table 1

No description provided.


Production of High Transverse Momentum Low Mass Electron - Positron Pairs in High-energy $p p$ Collisions

Chilingarov, A. ; Clark, A.G. ; Darriulat, P. ; et al.
Nucl.Phys.B 151 (1979) 29-45, 1979.
Inspire Record 133024 DOI 10.17182/hepdata.34778

The production of electron-positron pairs of masses below 1200 MeV/ c 2 and of transverse momentum above 1.8 GeV/ c has been studied in pp collisions at √ s = 53 and 63 GeV. The cross section for ϱ, ω, and φ production are presented. The continuum below 600 MeV/ c 2 is consistent with origination from Dalitz decays of η and ω mesons and from semileptonic decay of D and D mesons.

1 data table
Table 1

No description provided.