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Measurement of differential cross sections for single diffractive dissociation in $\sqrt{s} = 8$ TeV $pp$ collisions using the ATLAS ALFA spectrometer

The ATLAS collaboration
JHEP 02 (2020) 042, 2020.

Abstract (data abstract)
A dedicated sample of Large Hadron Collider proton-proton collision data at centre-of-mass energy s√=8 TeV is used to study inclusive single diffractive dissociation, pp→Xp. The intact final-state proton is reconstructed in the ATLAS ALFA forward spectrometer, while charged particles from the dissociated system X are measured in the central detector components. Cross sections are measured differentially as functions of the proton fractional energy loss ξ, the squared four-momentum transfer t, and Δη, a variable that characterises the rapidity gap separating the proton and the system X. The data are consistent with an exponential t dependence, dσ/dt∝eBt with slope parameter B=7.65±0.34 GeV−2. Interpreted in the framework of Regge phenomenology, the ξ dependence leads to a pomeron intercept of α(0)=1.07±0.09.

  • Table 1

    Data from FIGURE 3.

    10.17182/hepdata.93063.v1/t1

    Hadron-level differential SD cross section as a function of Delta Eta.

  • Table 2

    Data from FIGURE 4.

    10.17182/hepdata.93063.v1/t2

    Hadron-level differential SD cross section as a function of t.

  • Table 3

    Data from FIGURE 5a.

    10.17182/hepdata.93063.v1/t3

    Hadron-level differential SD cross section as a function of log_10 xi.

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