Zobrazeno 1 - 10
of 16
pro vyhledávání: '"Schönleber, Jakob"'
We discuss the nonlocal generalization of the QCD chiral anomaly along the light-cone and derive relations between twist-two, twist-three and twist-four generalized parton distributions (GPDs) mediated by the anomaly. We further establish the connect
Externí odkaz:
http://arxiv.org/abs/2411.07024
We identify a $ 2 \to 3 $ exclusive process, where collinear factorisation is broken, namely the exclusive photoproduction of a $ \pi ^{0}\gamma $ pair with large invariant mass. This occurs because the process suffers from gluon exchanges trapped in
Externí odkaz:
http://arxiv.org/abs/2409.20430
Autor:
Chowdhury, Talal Ahmed, Izubuchi, Taku, Kamruzzaman, Methun, Karthik, Nikhil, Khan, Tanjib, Liu, Tianbo, Paul, Arpon, Schoenleber, Jakob, Sufian, Raza Sabbir
Lattice quantum chromodynamics (QCD) calculations share a defining challenge by requiring a small finite range of spatial separation $z$ between quark/gluon bilinears for controllable power corrections in the perturbative QCD factorization, and a lar
Externí odkaz:
http://arxiv.org/abs/2409.17234
We exhibit an exclusive process, namely the photoproduction of a $\pi^{0}\gamma$ pair with large invariant mass, which violates collinear factorization. We explicitly demonstrate that this is due to the fact that there exists diagrams with gluon exch
Externí odkaz:
http://arxiv.org/abs/2409.16067
Autor:
Schoenleber, Jakob, Szafron, Robert
We discuss all-order factorization for the virtual Compton process at next-to-leading power (NLP) in the $\Lambda_{\rm QCD}/Q$ and $\sqrt{-t}/Q$ expansion (twist-3), both in the double-deeply-virtual case and the single-deeply-virtual case. We use th
Externí odkaz:
http://arxiv.org/abs/2407.09263
Autor:
Hatta, Yoshitaka, Schoenleber, Jakob
We present a QCD analysis of the twist-three parton distribution functions associated with the spin-orbit correlation of quarks and gluons in spin-$\frac{1}{2}$ and spin-0 hadrons. We derive exact non-perturbative identities decomposing the spin-orbi
Externí odkaz:
http://arxiv.org/abs/2404.18872
Autor:
Duplančić, Goran, Nabeebaccus, Saad, Passek-K., Kornelija, Pire, Bernard, Schönleber, Jakob, Szymanowski, Lech, Wallon, Samuel
We discuss the exclusive photoproduction of a photon-meson pair with large $ p_{T} $ as a channel to probe generalised parton distributions (GPDs). Like other $ 2\to3 $ exclusive processes, this channel allows us to better study the $ x $-dependence
Externí odkaz:
http://arxiv.org/abs/2401.17656
High-order behavior of the perturbative expansion for short-distance observables in QCD is intimately related to the contributions of small momenta in the corresponding Feynman diagrams and this correspondence provides one with a useful tool to inves
Externí odkaz:
http://arxiv.org/abs/2401.08012
We study the exclusive photoproduction of a $ \pi ^{0}\gamma $ pair with large invariant mass $ M^{2}_{\gamma \pi} $, which is sensitive to the exchange of either two quarks or two gluons in the $ t $-channel. In this paper, we show that the process
Externí odkaz:
http://arxiv.org/abs/2311.09146
Autor:
Ji, Yao, Schoenleber, Jakob
We calculate the two-loop flavor-singlet axial-vector and gluon transversity coefficient functions for deeply virtual Compton scattering in QCD. We observe interesting properties regarding the transcendentality of the transversity coefficient functio
Externí odkaz:
http://arxiv.org/abs/2310.05724