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Measurement of the total cross section from elastic scattering in $pp$ collisions at $\sqrt{s}=8$ TeV with the ATLAS detector

The ATLAS collaboration Aaboud, Morad ; Aad, Georges ; Abbott, Brad ; et al.

Phys.Lett.B 761 (2016) 158-178, 2016.

Inspire Record 1477585 DOI 10.17182/hepdata.73997

A measurement of the total $pp$ cross section at the LHC at $\sqrt{s}=8$ TeV is presented. An integrated luminosity of $500$ $\mu$b$^{-1}$ was accumulated in a special run with high-$\beta^{\star}$ beam optics to measure the differential elastic cross section as a function of the Mandelstam momentum transfer variable $t$. The measurement is performed with the ALFA sub-detector of ATLAS. Using a fit to the differential elastic cross section in the $-t$ range from $0.014$ GeV$^2$ to $0.1$ GeV$^2$ to extrapolate $t\rightarrow 0$, the total cross section, $\sigma_{\mathrm{tot}}(pp\rightarrow X)$, is measured via the optical theorem to be: $\sigma_{\mathrm{tot}}(pp\rightarrow X) = {96.07} \; \pm 0.18 \; ({{stat.}}) \pm 0.85 \; ({{exp.}}) \pm 0.31 \; ({extr.}) \; {mb} \;,$ where the first error is statistical, the second accounts for all experimental systematic uncertainties and the last is related to uncertainties in the extrapolation $t\rightarrow 0$. In addition, the slope of the exponential function describing the elastic cross section at small $t$ is determined to be $B = 19.74 \pm 0.05 \; ({{stat.}}) \pm 0.23 \; ({{syst.}}) \; {GeV}^{-2}$.

6 data tables

Table 1

The measured total cross section, the first systematic error accounts for all experimental uncertainties and the second error for the extrapolation t-->0.

Table 2

The nuclear slope of the differential eslastic cross section at small |t|, the first systematic error accounts for all experimental uncertainties and the second error for the extrapolation t-->0.

Table 3

The total elastic cross section and the observed elastic cross section within the fiducial volume.

Table 5

The measured differential elastic cross section. In addition to the statistical and total systematic uncertainties, the following 22 systematic shifts are given, which are included in the profile fit with their signs: -- Constraints: Beam optics uncertainty obtained by varying the ALFA constraints in the optics fit -- QScan: Variation by +/- 0.1 % of the quadrupole strength -- Q2: Fit of the strength of Q2 using the best value for the strength of Q1 and Q3 -- Q5Q6: Variation of the strength of Q5 and Q6 by -0.2% as indicated by machine constraints -- MadX: Uncertainty related to the beam transport replacing matrix transport by MadX PTC tracking -- Qmisal: Uncertainty due to the mis-alignment of the quadrupoles in the beam line -- Q1Q3: Propagation of the optics fit uncertainty in the strenght of Q1 and Q3 on the differential elastic cross section -- Aopt: Alignment uncertainty from the optimization procedure -- Offv: Alignment uncertainty related to the vertical beam center offset -- Offh: Alignment uncertainty related to the horizontal beam center offset -- Ang: Alignment uncertainty related to the detector rotation in the x-y plane -- BGn: Uncertainty from the background normalization -- BGs: Uncertainty from the background shape -- MCres: Error from modelling of the detector response -- Slope: Residual dependence on the physics model estimated by varying the nuclear slope in the simulation by +/- 1 GeV^-2 -- Emit: Uncertainty from the emittance used to calculate beam divergence in the simulation -- Unf: Unfolding uncertainty from the data-driven closure test -- Trac: Uncertainty from the variation of the track reconstruction selection cuts -- Xing: Uncertainty from residual crossing angle in the horizontal plane -- Eff: Uncertainty from the reconstruction efficiency -- Lumi: Luminosity uncertainty (+/- 1.5%) -- Ebeam: Uncertainty from the nominal beam energy (+/- 0.65%) Small differences in the values given here compared to the published version are related to insignificant rounding issues.

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Energy dependence of the spin-spin correlation parameter $C_{NN}$ at 50° and 90° c.m. for pp-elastic scattering in the energy range 0.69–0.95 GeV

Efimovyh, V.A. ; Kovalev, A.I. ; Poljakov, V.V. ; et al.

Phys.Lett.B 99 (1981) 28-32, 1981.

Inspire Record 1389635 DOI 10.17182/hepdata.27135

The spin-spin correlation parameter C NN at 50° and 90° c.m. for elastic pp-scattering has been obtained in the energy range 0.69–0.95 GeV. It was found that the parameter C NN (90°) shows resonance-like structure at energies near 700 MeV. Its energy dependence does not agree with Hoshizaki's phase-shift analysis predictions. C NN (50°) agrees well with these predictions and does not show any structure within the accuracy of the measurements.

1 data table

Table 1

No description provided.

Pion Production in 650-MeV p-p Collisions

Guzhavin, V.M. ; Kliger, G.K. ; Kolganov, V.Z. ; et al.

Sov.Phys.JETP 19 (1964) 847-854, 1964.

Inspire Record 1387586 DOI 10.17182/hepdata.70070

The angular and energy distributions of pions produced by 650-MeV protons and pion-nucleon correlations were studied using a liquid hydrogen bubble chamber. The present investigation indicates that the experimental angular distributions of neutral and charged pions are consis- tent with the assumption of isotopic spin conservation. The contributions of rrN subsystem states with isospin T 11'N = 7' 2 and % are measured; the contribution of the latter is 72 ± 3%.

1 data table

Table 1

No description provided.

Polarization parameters A(000n) and A(00nn) in elastic proton proton scattering in the energy region 690-MeV to 890-MeV

Vovchenko, V.G. ; Efimovykh, V.A. ; Zhdanov, A.A. ; et al.

Sov.J.Nucl.Phys. 49 (1989) 446-453, 1989.

Inspire Record 292935 DOI 10.17182/hepdata.17325

None

3 data tables

Table 1

Axis error includes +- 0.0/0.0 contribution (DUE TO QUAZIELASTIC BACKGROUND AND ERRORS IN POLARIZATION OF BEAM AND TARGET).

Table 2

Axis error includes +- 0.0/0.0 contribution (DUE TO QUAZIELASTIC BACKGROUND AND ERRORS IN POLARIZATION OF BEAM AND TARGET).

Table 3

Axis error includes +- 0.0/0.0 contribution (DUE TO QUAZIELASTIC BACKGROUND AND ERRORS IN POLARIZATION OF BEAM AND TARGET).

EXPERIMENTAL DATA ON ELASTIC p p, n p, p d AND p gamma FORWARD SCATTERING AT INTERMEDIATE-ENERGIES

Dobrovolsky, A.V. ; Khanzadeev, A.V. ; Korolev, G.A. ; et al.

LENINGRAD-88-1454, 1988.

Inspire Record 270168 DOI 10.17182/hepdata.38078

None

26 data tables

Table 1

Table 2

Table 3

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ANGULAR DEPENDENCE OF THE POLARIZATION CORRELATION PARAMETER A(00NN) AND THE ASYMMETRY PARAMETER A(000N) IN ELASTIC PROTON PROTON SCATTERING AT 690-MEV - 950-MEV

Vovchenko, V.G. ; Efimovykh, V.A. ; Zhdanov, A.A. ; et al.

JETP Lett. 44 (1986) 151-154, 1986.

Inspire Record 240718 DOI 10.17182/hepdata.16827

None

2 data tables

Table 1

No description provided.

Table 2

No description provided.

MEASUREMENTS OF THE POLARIZATION TRANSFER PARAMETER K(N00N) IN P P SCATTERING AT 800-MEV - 970-MEV

Borisov, N.S. ; Vovchenko, V.G. ; Efimovykh, V.A. ; et al.

JETP Lett. 43 (1986) 722-725, 1986.

Inspire Record 240172 DOI 10.17182/hepdata.16828

None

1 data table

Table 1

No description provided.

MEASUREMENT OF POLARIZATION PARAMETERS AND P P SCATTERING ANALYSIS AT 1.0-GeV

Vovchenko, V.G. ; Zhdanov, A.A. ; Kazarinov, Yu.M. ; et al.

LENINGRAD-84-995, 1984.

Inspire Record 208487 DOI 10.17182/hepdata.9315

None

2 data tables

Table 1

No description provided.

Table 2

No description provided.

SMALL ANGLE P P SCATTERING AT ENERGIES FROM 650-MEV TO 1000-MEV

Dobrovolsky, A.v. ; Khanzadeev, A.v. ; Korolev, G.a. ; et al.

Nucl.Phys.B 214 (1983) 1-20, 1983.

Inspire Record 192453 DOI 10.17182/hepdata.33966

Absolute differential cross sections for pp elastic scattering have been measured at kinetic energies of 648, 746, 795, 843, 892, 942 and 992 MeV and for momentum transfer 0.006 < z . sfnctz . sfnc <0.040 (GeV/ c ) 2 . Both scattered and recoil protons were detected in coincidence. The slope parameters of the diffraction cone and the contribution of the spin-spin amplitudes to forward elastic pp scattering were determined.

7 data tables

Table 1

No description provided.

Table 2

No description provided.

Table 3

No description provided.

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Soft $\pi^- p$ and $p p$ Elastic Scattering in the Energy Range 30-{GeV} to 345-{GeV}

Burq, J.P. ; Chemarin, M. ; Chevallier, M. ; et al.

Nucl.Phys.B 217 (1983) 285-335, 1983.

Inspire Record 182455 DOI 10.17182/hepdata.7556

Differential cross sections for π − p and pp elastic scattering have been measured at incident momenta ranging from 30 to 345 GeV and in the t range 0.002 (GeV/ c ) 2 ⩽ | t | ⩽ 0.04 (GeV/ c ) 2 . From the analysis of the data, the ratio ϱ ( t = 0) of the real to the imaginary parts of the forward scattering amplitude was determined together with the logarithmic slope b of the diffraction cone.

13 data tables

Table 1

No description provided.

Table 2

No description provided.

Table 3

No description provided.

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Measurement of the total cross section from elastic scattering in $pp$ collisions at $\sqrt{s}=8$ TeV with the ATLAS detector

Energy dependence of the spin-spin correlation parameter $C_{NN}$ at 50° and 90° c.m. for pp-elastic scattering in the energy range 0.69–0.95 GeV

Pion Production in 650-MeV p-p Collisions

Polarization parameters A(000n) and A(00nn) in elastic proton proton scattering in the energy region 690-MeV to 890-MeV

EXPERIMENTAL DATA ON ELASTIC p p, n p, p d AND p gamma FORWARD SCATTERING AT INTERMEDIATE-ENERGIES

ANGULAR DEPENDENCE OF THE POLARIZATION CORRELATION PARAMETER A(00NN) AND THE ASYMMETRY PARAMETER A(000N) IN ELASTIC PROTON PROTON SCATTERING AT 690-MEV - 950-MEV

MEASUREMENTS OF THE POLARIZATION TRANSFER PARAMETER K(N00N) IN P P SCATTERING AT 800-MEV - 970-MEV

MEASUREMENT OF POLARIZATION PARAMETERS AND P P SCATTERING ANALYSIS AT 1.0-GeV

SMALL ANGLE P P SCATTERING AT ENERGIES FROM 650-MEV TO 1000-MEV

Soft $\pi^- p$ and $p p$ Elastic Scattering in the Energy Range 30-{GeV} to 345-{GeV}