ZEU-NIC

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2018-05-24
11:31
Embargoed OpenAccess [PUBDB-2018-02088] Report/Journal Article
; ; ; et al
Parton distributions and lattice QCD calculations: A community white paper
[DESY-17-185; IFJPAN-IV-2017-19; INT-PUB-17-042; MSUHEP-17-017; NIKHEF-2017-047; OUTP-17-15P; SMU-HEP-17-08; arXiv:1711.07916]
In the framework of quantum chromodynamics (QCD), parton distribution functions (PDFs) quantify how the momentum and spin of a hadron are divided among its quark and gluon constituents. Two main approaches exist to determine PDFs. [...]
Published on 2018-01-31. Available in OpenAccess from 2019-01-31.: Download fulltextPDF Download fulltextPDF (PDFA); Restricted: Download fulltextPDF Download fulltextPDF (PDFA);
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2018-05-23
10:59
OpenAccess [PUBDB-2018-02053] Report/Journal Article
; ; ; et al
From the $SU(2)$ quantum link model on the honeycomb lattice to the quantum dimer model on the kagome lattice: Phase transition and fractionalized flux strings
[arXiv:1712.08300]
We consider the (2+1)-dimensional SU(2) quantum link model on the honeycomb lattice and show that it is equivalent to a quantum dimer model on the kagome lattice. The model has crystalline confined phases with spontaneously broken translation invariance associated with pinwheel order, which is investigated with either a Metropolis or an efficient cluster algorithm [...]
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2018-05-23
10:56
OpenAccess [PUBDB-2018-02052] Report/Journal Article
; ; ; et al
Strange nucleon electromagnetic form factors from lattice QCD
[arXiv:1801.09581]
We evaluate the strange nucleon electromagnetic form factors using an ensemble of gauge configurations generated with two degenerate maximally twisted mass clover-improved fermions with mass tuned to approximately reproduce the physical pion mass. In addition, we present results for the disconnected light quark contributions to the nucleon electromagnetic form factors [...]
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2018-05-22
14:40
Embargoed OpenAccess [PUBDB-2018-02032] Report/Journal Article
; ; ; et al
SO(3) "Nuclear Physics" with ultracold Gases
[arXiv:1802.00022]
An ab initio calculation of nuclear physics from Quantum Chromodynamics (QCD), the fundamental $SU(3)$ gauge theory of the strong interaction, remains an outstanding challenge. Here, we discuss the emergence of key elements of nuclear physics using an $SO(3)$ lattice gauge theory as a toy model for QCD. [...]
Published on 2018-04-05. Available in OpenAccess from 2019-04-05.: Download fulltextPDF Download fulltextPDF (PDFA); Restricted: Download fulltextPDF Download fulltextPDF (PDFA);
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2018-05-15
12:00
OpenAccess [PUBDB-2018-01963] Preprint/Report
; ; ; et al
Lattice QCD study of the $H$ dibaryon using hexaquark and two-baryon interpolators
[CERN-TH-2018-098; DESY-18-066; HIM-2018-02; MITP-18-030; TIFR-TH-18-12; arXiv:1805.03966]
 GO
We present a lattice QCD spectroscopy study in the isospin singlet, strangeness $-2$ sectors relevant for the conjectured $H$ dibaryon. We employ both hexaquark and two-baryon interpolating operators to isolate the ground state in the rest frame and in moving frames. [...]
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2018-04-23
14:01
OpenAccess [PUBDB-2018-01829] Report/Journal Article
; ; ; et al
Topological susceptibility from twisted mass fermions using spectral projectors and the gradient flow
[DESY-17-139; arXiv:1709.06596]
We compare lattice QCD determinations of topological susceptibility using a gluonic definition from the gradient flow and a fermionic definition from the spectral projector method. We use ensembles with dynamical light, strange and charm flavors of maximally twisted mass fermions. [...]
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2018-04-03
09:34
OpenAccess [PUBDB-2018-01610] Preprint/Report
; ; ; et al
A non-perturbative exploration of the high energy regime in $N_\text{f}=3$ QCD
[DESY-18-044; CERN-TH-2018-060; WUB-18-01; arXiv:1803.10230]
 GO
Using continuum extrapolated lattice data we trace a family of running couplings in three-flavour QCD over a large range of scales from about 4 to 128 GeV. The scale is set by the finite space time volume so that recursive finite size techniques can be applied, and Schr\'odinger functional (SF) boundary conditions enable direct simulations in the chiral limit. [...]
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2018-03-12
12:35
OpenAccess [PUBDB-2018-01450] Dissertation / PhD Thesis

Non-perturbative investigation of current correlators in twisted mass lattice QCD
Humboldt-Universität zu Berlin, Mathematisch-Naturwissenschaftliche Fakultät I , 209 pp. () [10.18452/16770] = Dissertation, Humboldt-Universität zu Berlin, 2013  GO
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2018-03-12
12:28
OpenAccess [PUBDB-2018-01449] Dissertation / PhD Thesis
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Chiral description and physical limit of pseudoscalar decay constants with four dynamical quarks and applicability of quasi-Monte Carlo for lattice systems
Humboldt-Universität zu Berlin, Mathematisch-Naturwissenschaftliche Fakultät I , 107 pp. () [10.18452/17244] = Dissertation, Humboldt-Universität zu Berlin, 2014  GO
In dieser Arbeit werden Massen und Zerfallskonstanten von pseudoskalaren Mesonen, insbes. dem Pion und dem D-s-Meson, im Rahmen der Quantenchromodynamik (QCD) berechnet [...]
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2018-03-12
11:18
OpenAccess [PUBDB-2018-01447] Dissertation / PhD Thesis
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Investigations of chiral symmetry breaking and topological aspects of lattice QCD
Humboldt-Universität zu Berlin, Mathematisch-Naturwissenschaftliche Fakultät I , 198 pp. () [10.18452/16890] = Dissertation, Humboldt-Universität zu Berlin, 2013  GO
Die spontane Brechung der chiralen Symmetrie ist ein faszinierendes Phenomän der QCD mit fundamentalen phänomenologischen Implikationen. Die Brechung der chiral Symmetrie ist beispielsweise verantwortlich für die niedrige Masse der Pionen, welche die effektiven Goldstone Boson der spontan gebrochene Symmetrie sind [...]
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