Diffractive Bremsstrahlung in Hadronic Collisions

Pasechnik, Roman; Kopeliovich, B. Z.; Potashnikova, I. K.

doi:10.1155/2015/701467

Cited by 7 publications

(6 citation statements)

References 90 publications

(198 reference statements)

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“…Ref. [3] and references therein). A similar contradiction arises for the DY reaction at large x F which was seen from the data [40].…”

Section: Diffractive Heavy Flavor Productionmentioning

confidence: 99%

“…9, right [39] (for more details, see Ref. [3]). So the interaction with spectators again plays an important role as one of the source for the diffractive factorisation breaking.…”

Section: Diffractive Heavy Flavor Productionmentioning

confidence: 99%

“…One may naturally be tempted to extend such a factorization scheme to diffractive reactions with a large rapidity gap. However, such diffractive factorisation turns out to be unavoidably broken and does not hold in practice [2,3].…”

Section: Introductionmentioning

confidence: 99%

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Hard hadronic diffraction is not hard

Kopeliovich

Pasechnik²,

Potashnikova

2016

Int. J. Mod. Phys. E

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Hadronic diffractive processes characterised by a hard scale (hard diffraction) contain a nontrivial interplay of hard and soft, nonperturbative interactions, which breaks down factorisation of short and long distances. On the contrary to the expectations based on the factorization hypothesis, assuming that hard diffraction is a higher twist, these processes should be classified as a leading twist. We overview various implications of this important observation for diffractive radiation of Abelian (Drell-Yan, gauge bosons, Higgs boson) and non-Abelian (heavy flavors) particles, as well as direct coalescence into the Higgs boson of the non-perturbative intrinsic heavy flavour component of the hadronic wave function.

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“…Ref. [3] and references therein). A similar contradiction arises for the DY reaction at large x F which was seen from the data [40].…”

Section: Diffractive Heavy Flavor Productionmentioning

confidence: 99%

“…9, right [39] (for more details, see Ref. [3]). So the interaction with spectators again plays an important role as one of the source for the diffractive factorisation breaking.…”

Section: Diffractive Heavy Flavor Productionmentioning

confidence: 99%

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Hard hadronic diffraction is not hard

Kopeliovich

Pasechnik²,

Potashnikova

2016

Int. J. Mod. Phys. E

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“…3 (for an analogous discussion in the case of diffractive Abelian bremsstrahlung, see Refs. [9][10][11][12]14]). At hadron colliders such as Tevatron, however, the jet rapidities may extend down to central values where the contribution from diffractive gluon excitation, given by the gluon splitting subprocesses G → q q and G → GG, become important.…”

Section: Single-diffractive Dijets Productionmentioning

confidence: 99%

Diffractive dijet production: Breakdown of factorization

Kopeliovich¹,

Pasechnik²,

Potashnikova³

2018

Phys. Rev. D

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We analyse the origin of dramatic breakdown of diffractive factorisation, observed in singlediffractive (SD) dijet production in hadronic collisions. One of the sources is the application of the results of measurements of the diagonal diffractive DIS to the off-diagonal hadronic diffractive process. The suppression caused by a possibility of inelastic interaction with the spectator partons is calculated at the amplitude level, differently from the usual probabilistic description. It turns out, however, that interaction with the spectator partons not only suppresses the SD cross section, but also gives rise to the main mechanism of SD dijet production, which is another important source of factorization failure. Our parameter-free calculations of SD-to-inclusive cross section ratio, performed in the dipole representation, agrees with the corresponding CDF Tevatron (Run II) data at √ s = 1.96 TeV in the relevant kinematic regions. The energy and hard scale dependences demonstrate a trend, opposite to the factorisation-based expectations, similarly to the effect observed earlier in diffractive Abelian radiation.

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“…Making a plausible (not proven) assumption about universality of the former, one can measure it with electro-weak hard probes (DIS, Drell-Yan process) and apply to hard hadronic processes. Although it is tempting to extend this factorization scheme to diffractive, large rapidity gap processes, it turns out to be heavily broken [2,3], as is demonstrated below.…”

Section: Qcd Factorization In Diffractionmentioning

confidence: 99%

Breakdown of QCD factorization in hard diffraction

Kopeliovich

2016

EPJ Web of Conferences

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Abstract. Factorization of short-and long-distance interactions is severely broken in hard diffractive hadronic collisions. Interaction with the spectator partons leads to an interplay between soft and hard scales, which results in a leading twist behavior of the cross section, on the contrary to the higher twist predicted by factorization. This feature is explicitly demonstrated for diffractive radiation of abelian (Drell-Yan, gauge bosons, Higgs) and non-abelian (heavy flavors) particles.

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Diffractive Bremsstrahlung in Hadronic Collisions

Cited by 7 publications

References 90 publications

Hard hadronic diffraction is not hard

Hard hadronic diffraction is not hard

Diffractive dijet production: Breakdown of factorization

Breakdown of QCD factorization in hard diffraction

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