Multiplicity structure of the hadronic final state in diffractive deep-inelastic scattering at HERA

Adloff, C.

doi:10.1007/s100529800963

Cited by 18 publications

(6 citation statements)

References 42 publications

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“…Particle multiplicity distributions have previously been measured in deep inelastic scattering (DIS) at HERA [12][13][14][15][16]. In this paper, charged particle multiplicity distributions in positron-proton (ep) DIS at √ s = 319 GeV are reported using high statistics data collected with the H1 detector.…”

Section: Introductionmentioning

confidence: 99%

Measurement of charged particle multiplicity distributions in DIS at HERA and its implication to entanglement entropy of partons

et al. 2021

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Charged particle multiplicity distributions in positron-proton deep inelastic scattering at a centre-of-mass energy $$\sqrt{s}=319$$ s = 319 GeV are measured. The data are collected with the H1 detector at HERA corresponding to an integrated luminosity of 136 pb$$^{-1}$$ - 1 . Charged particle multiplicities are measured as a function of photon virtuality $$Q^2$$ Q 2 , inelasticity y and pseudorapidity $$\eta $$ η in the laboratory and the hadronic centre-of-mass frames. Predictions from different Monte Carlo models are compared to the data. The first and second moments of the multiplicity distributions are determined and the KNO scaling behaviour is investigated. The multiplicity distributions as a function of $$Q^2$$ Q 2 and the Bjorken variable $$x_{\mathrm{bj}}$$ x bj are converted to the hadron entropy $$S_{\mathrm{hadron}}$$ S hadron , and predictions from a quantum entanglement model are tested.

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Section: Introductionmentioning

confidence: 99%

Measurement of charged particle multiplicity distributions in DIS at HERA and its implication to entanglement entropy of partons

et al. 2021

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“…Second, the H1 data are concentrated in the current fragmentation region (see also Refs. [6][7][8][9]), where the dominant partons are (sea) quarks and antiquarks -so the relevant structure functions are the quark and antiquark ones, see Fig. 2.…”

mentioning

confidence: 99%

Deep inelastic scattering as a probe of entanglement

2017

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Parton distributions can be defined in terms of the entropy of entanglement between the spatial region probed by deep inelastic scattering (DIS) and the rest of the proton. This approach leads to a simple relation S = ln[xG(x)] between the gluon structure function xG(x) and the entropy of the produced hadronic state S; it is valid at sufficiently small Bjorken x, where gluons dominate and the proton becomes a maximally entangled state. Recently, the H1 Collaboration analyzed the entropy of the hadronic state in DIS, and studied its relation to the gluon structure function; poor agreement with the predicted relation was found. Here we show that the data from the H1 Collaboration in fact agree well with the prediction based on entanglement, once two important effects are taken into account: i) because the hadron multiplicity N in the H1 measurement is not large, ∼ 1/N corrections to the predicted relation have to be included; and ii) since the measured hadrons are mostly in the current fragmentation region, the relevant structure function is not the gluon but the sea quark one.

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“…20 shows η-distributions for single diffraction in two mass bins with M X = 100 GeV and M X = 140, in pp collisions at W = 546 GeV. We see that a rapidity plateau with dN ch /dη ∼ 2.5 is developed for Figure 19: The average charged multiplicity as function of rapidity in bins of M X (left) [70], and average energy flow as function of pseudorapidity in bins of M X (right) [71]. The results correspond to W = 120 GeV and Q 2 = 24 GeV 2 .…”

Section: Pp and Pp Collisionsmentioning

confidence: 96%

“…Some results for the properties of the hadronic final state, obtained after final state radiation and hadronization, are presented in figs. 18 and 19, and compared with HERA data from H1 [70,71]. In all cases the results are obtained for W = 120 GeV and Q 2 = 24 GeV 2 .…”

Section: Dismentioning

confidence: 99%

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Exclusive final states in diffractive excitation

Flensburg

Gustafson

Lönnblad

2012

J. High Energ. Phys.

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In this paper we describe a formalism for generating exclusive final states in diffractive excitation, based on the optical analogy where diffraction is fully determined by the absorption into inelastic channels. The formalism is based on the Good-Walker formalism for diffractive excitation, and it is assumed that the virtual parton cascades represent the diffractive eigenstates defined by a definite absorption amplitude. We emphasize that, although diffractive excitation is basically a quantum-mechanical phenomenon with strong interference effects, it is possible to calculate the different interfering components to the amplitude in an event generator, add them and thus calculate the reaction cross section for exclusive diffractive final states. The formalism is implemented in the DIPSY event generator, introducing no tunable parameters beyond what has been determined previously in studies of non-diffractive events. Some early results for DIS and proton-proton collisions are presented, and compared to experimental data.

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Multiplicity structure of the hadronic final state in diffractive deep-inelastic scattering at HERA

Cited by 18 publications

References 42 publications

Measurement of charged particle multiplicity distributions in DIS at HERA and its implication to entanglement entropy of partons

Measurement of charged particle multiplicity distributions in DIS at HERA and its implication to entanglement entropy of partons

Deep inelastic scattering as a probe of entanglement

Exclusive final states in diffractive excitation

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