Zobrazeno 1 - 10
of 1 806
pro vyhledávání: '"disconnected diagrams"'
The calculation of disconnected diagram contributions to physical signals is a computationally expensive task in Lattice QCD. To extract the physical signal, the trace of the inverse Lattice Dirac operator, a large sparse matrix, must be stochastical
Externí odkaz:
http://arxiv.org/abs/2212.04430
Publikováno v:
In Computer Physics Communications January 2024 294
We present our preliminary results concerning the charged/neutral pion mass difference $M_{\pi^{+}} - M_{\pi^{0}}$ at order $\mathcal{O}(\alpha_{em})$ in the QED interactions, and for $M_{\pi^{+}} - M_{\pi^{0}}$ at order $\mathcal{O}\left( (m_{d}-m_{
Externí odkaz:
http://arxiv.org/abs/2112.01066
Autor:
Jin, Luchang, Blum, Thomas, Christ, Norman, Hayakawa, Masashi, Izubuchi, Taku, Jung, Chulwoo, Lehner, Christoph
We report our recent lattice calculation of hadronic light-by-light contribution to muon $g-2$ using our recently developed moment method. The connected diagrams and the leading disconnected diagrams are included. The calculation is performed on a $4
Externí odkaz:
http://arxiv.org/abs/1611.08685
Autor:
Abdel-Rehim, Abdou, Alexandrou, Constantia, Constantinou, Martha, Finkenrath, Jacob, Hadjiyiannakou, Kyriakos, Jansen, Karl, Kallidonis, Christos, Koutsou, Giannis, Avilés-Casco, Alejandro Vaquero
Publikováno v:
PoS(LATTICE2016)155
The latest results from the Twisted-Mass collaboration on disconnected diagrams at the physical value of the pion mass are presented. In particular, we focus on the sigma terms, the axial charges and the momentum fraction, all of them for the nucleon
Externí odkaz:
http://arxiv.org/abs/1611.03802
Autor:
Gambhir, Arjun Singh, Stathopoulos, Andreas, Orginos, Kostas, Yoon, Boram, Gupta, Rajan, Syritsyn, Sergey
Publikováno v:
PoS(LATTICE2016)265
Computing disconnected diagrams in Lattice QCD (operator insertion in a quark loop) entails the computationally demanding problem of taking the trace of the all to all quark propagator. We first outline the basic algorithm used to compute a quark loo
Externí odkaz:
http://arxiv.org/abs/1611.01193
Autor:
Wakayama, Masayuki, Kunihiro, Teiji, Muroya, Shin, Nakamura, Atsushi, Nonaka, Chiho, Sekiguchi, Motoo, Wada, Hiroaki
We study the possible significance of four-quark states in the iso-singlet scalar mesons ($J^{PC}=0^{++}$, $I=0$) by performing two-flavor full lattice QCD simulations on an $8^3 \times 16$ lattice using the improved gauge action and the clover-impro
Externí odkaz:
http://arxiv.org/abs/1412.3909
Autor:
Alexandrou, Constantia, Hadjiyiannakou, Kyriacos, Koutsou, Giannis, Strelchenko, Alexei, Vaquero, Alejandro
Although QUDA allows for an efficient computation of many QCD quantities, it is surprinsingly lacking tools to evaluate disconnected diagrams, for which GPUs are specially well suited. We aim to fill this gap by creating our own branch of QUDA, which
Externí odkaz:
http://arxiv.org/abs/1401.6750
Autor:
Liu, Qi
Publikováno v:
PoS LAT2009:101,2009
A full, high-statistic I=0 and I=2 $\pi-\pi$ scattering calculation including the disconnected diagram is performed on 2+1 flavor, domain wall fermion gauge configurations generated using the Iwasaki gauge action with $\beta=2.13$, a $16^3\times32$ v
Externí odkaz:
http://arxiv.org/abs/0910.2658
Autor:
Juttner, Andreas
Expressions for the Wick contractions contributing to the scalar pion form-factor were computed model-independently in chiral perturbation theory at next-to-leading order. The results reveal correlations amongst the different contractions in terms of
Externí odkaz:
http://arxiv.org/abs/1212.2559