Ellsworth, R.W.
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Anti-proton - proton elastic scattering at s**(1/2) = 1020-GeV

The E710 collaboration Amos, Norman A. ; Avila, C. ; Baker, W.F. ; et al.
Nuovo Cim.A 106 (1993) 123-132, 1993.
Inspire Record 338043 DOI 10.17182/hepdata.42674

The antiproton-proton small-angle elastic-scattering distribution was measured at\(\sqrt s \) GeV at the Fermilab Tevatron Collider. A fit to the nuclear-scattering distribution in the range 0.065≤|t|≤0.21 (GeV/c)2 givesb=(16.2±0.5±0.5) (GeV/c)−2 for the logarithmic slope parameter. Using the optical theorem and the luminosity from Collider parameters, we obtain σtoto(1+ρ2)1/2 =(61.7±3.7±4.4)mb.

3 data tables
Table 1

No description provided.

Table 2

Cross sections derived assuming RE(AMP)/IM(AMP) = 0.140, see Phys. Lett. B188, 143 (1987).

Table 3

Slope was derived in the t range -0.065 < t < -0.21 (GeV/c)**2.


Measurement of rho, the ratio of the real to imaginary part of the anti-p p forward elastic scattering amplitude, at S**(1/2) = 1.8-TeV

The E710 collaboration Amos, Norman A. ; Avila, C. ; Baker, W.F. ; et al.
Phys.Rev.Lett. 68 (1992) 2433-2436, 1992.
Inspire Record 320369 DOI 10.17182/hepdata.42565

We have measured ρ, the ratio of the real to the imaginary part of the p¯p forward elastic-scattering amplitude, at √s =1.8 TeV. Our result, ρ=0.140±0.069, is compared with extrapolations from lower-energy data based on dispersion relations, and with the UA4 value at √s =546 GeV.

2 data tables
Table 1

Results of least square's fit to the distribution.

Table 2

Total cross section from fit to data.


A Luminosity Independent Measurement of the $\bar{p} p$ Total Cross-section at $\sqrt{s}=1$.8-tev

The E-710 collaboration Amos, Norman A. ; Avila, C. ; Baker, W.F. ; et al.
Phys.Lett.B 243 (1990) 158-164, 1990.
Inspire Record 27474 DOI 10.17182/hepdata.29696

We report a measurement of the p p total cross section at √ s =1.8 TeV using a luminosity-independent method. Our result is σ T =72.1±3.3 mb ; we also derive the total elastic cross section σ el =16.6±1.6 mb. A value is obtained for the total single diffraction cross section of 11.7±2.3 mb.

4 data tables
Table 1

No description provided.

Table 2

Assuming RHO = 0.145.

Table 3

No description provided.

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Measurement of the anti-p p Total Cross-Section at s**(1/2) = 1.8-TeV

The E710 collaboration Amos, Norman A. ; Avila, C. ; Baker, W.F. ; et al.
Phys.Rev.Lett. 63 (1989) 2784, 1989.
Inspire Record 281851 DOI 10.17182/hepdata.19995

We have measured the antiproton-proton total cross section at √s =1.8 TeV at the Fermilab Tevatron Collider; the value obtained is 78.3±5.9 mb. B, the nuclear slope parameter for elastic scattering, was measured to be 16.3±0.5 (GeV/c)−2. From these data, we derive a value for the total elastic cross section.

4 data tables
Table 1

Nuclear Store Parameter.

Table 2

Total cross section measurement. Errors contain systematic effects folded including a 15 PCT error in luminosity measurement which dominates the error.

Table 3

Total cross section assuming RHO = 0.145 (low energy fit). If RHO is taken as 0.24 obtained by UA4 at sqrt(s) = 546 GeV, the value of SIG is reduced by 1.8 PCT.

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$\bar{p} p$ Annihilation Into $\pi^+ \pi^-$ and $K^+ K^-$ From Atomic $p$ States

The ASTERIX collaboration Doser, M. ; Botlo, M. ; Ahmad, S. ; et al.
Nucl.Phys.A 486 (1988) 493-511, 1988.
Inspire Record 261310 DOI 10.17182/hepdata.37012

We have obtained the branching ratios for p p annihilation at rest into π + π − and K + K − in a pure p p initial angular momentum state L = 1. A gaseous hydrogen target at normal pressure and temperature was used and events associated with transitions of the antiprotonic atom to the 2p level were selected by detecting the Balmer X-ray series. The branching ratios for p p annihilation into π + π − and K + K − from the 2p state are (4.81 ± 0.49) × 10 −3 and (2.87 ± 0.51) × 10 −4 , respect The pion yield is slightly larger than in liquid hydrogen, where L = 0 annihilation dominates, while the kaon yield is suppressed by a factor of four. Using these and previous data, we derive the branching ratios for pp annihilation into all ππ and K K modes from S and P states. A measurement in gaseous hydrogen, without X-ray requirement, yields the branching ratios (4.30 ± 0.14) × 10 −3 and (6.92 ± 0.41) × 10 −4 . With the known branching ratios of (3.33 ± 0.17) × 10 −3 and (1.01 ± 0.05) × 10 −3 in liquid hydrogen, we find that (50.3 ± 6.4)% of all annihilations in gas at NTP occur in the initial angular momentum state L = 1.

2 data tables
Table 1

Axis error includes +- 0.0/0.0 contribution (?////).

Table 2

Axis error includes +- 0.0/0.0 contribution (?////).


Total and absorption cross-sections of pi-, k- and anti-p in the momentum range 20-65 gev/c

Allaby, J.V. ; Bushnin, Yu.B. ; Gorin, Yu.P. ; et al.
Yad.Fiz. 12 (1970) 538-557, 1970.
Inspire Record 63289 DOI 10.17182/hepdata.18403

None

2 data tables
Table 1

No description provided.

Table 2

No description provided.


Total cross-sections of pi-minus, k-minus, and anti-p on protons and deuterons in the momentum range 20-65 gev/c

The IHEP-CERN collaboration Allaby, J.V. ; Bushnin, Yu.B. ; Denisov, S.P. ; et al.
Phys.Lett.B 30 (1969) 500-505, 1969.
Inspire Record 56636 DOI 10.17182/hepdata.6171

Total cross-section data are presented for negative pions, kaons, and antiprotons on protons and deuterons in the momentum range 20 GeV/ c to 65 GeV/ c in 5 GeV/ c steps.

3 data tables
Table 1

Axis error includes +- 0.0/0.0 contribution.

Table 2

No description provided.

Table 3

No description provided.