20170428 13:19 
[PUBDB201702111]
Report/Journal Article
Frezzotti, R. ; Hasenbusch, M. ; Wolff, U. ; et al
Comparative benchmarks of full QCD algorithms
[DESY00104; HUEP0030; NICDESY00002; BICOCCAFT0012; heplat/0009027]
ddc:004
We report performance benchmarks for several algorithms that we have used to simulate the Schr'odinger functional with two flavors of dynamical quarks. They include hybrid and polynomial hybrid Monte Carlo with preconditioning. [...]
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20170419 10:25 
[PUBDB201701687]
Report/Journal Article
Lellouch, L. ; Luscher, M.
Weak transition matrix elements from finite volume correlation functions
[heplat/0003023; CERNTH2000091; CPT2000PE3984; LAPTH78800]
ddc:530
The twobody decay rate of a weakly decaying particle (such as the kaon) is shown to be proportional to the square of a welldefined transition matrix element in finite volume. Contrary to the physical amplitude, the latter can be extracted from finitevolume correlation functions in euclidean space without analytic continuation. [...]
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20170419 10:22 
[PUBDB201701686]
Report/Journal Article
Luescher, M.
Lattice regularization of chiral gauge theories to all orders of perturbation theory
[heplat/0006014; CERNTH2000165]
ddc:530
In the framework of perturbation theory, it is possible to put chiral gauge theories on the lattice without violating the gauge symmetry or other fundamental principles, provided the fermion representation of the gauge group is anomalyfree. The basic elements of this construction (which starts from the GinspargWilson relation) are briefly recalled and the exact cancellation of the gauge anomaly, at any fixed value of the lattice spacing and for any compact gauge group, is then proved rigorously through a recursive procedure..
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20170313 15:10 
[PUBDB201701363]
Journal Article
Aoki, S. ; Aoki, Y. ; Bečirević, D. ; et al
Review of lattice results concerning lowenergy particle physics
ddc:530
We review lattice results related to pion, kaon, D and Bmeson physics with the aim of making them easily accessible to the particlephysics community. More specifically, we report on the determination of the lightquark masses, the form factor $f_+$(0), arising in the semileptonic $K → π$ transition at zero momentum transfer, as well as the decay constant ratio $f_{K}/f_π$ and its consequences for the CKM matrix elements Vus and Vud. [...]
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20170303 11:01 
[PUBDB201701277]
Journal Article
Cè, M. ; Giusti, L. ; Schaefer, S.
Local factorization of the fermion determinant in lattice QCD
ddc:530
We introduce a factorization of the fermion determinant in lattice QCD with Wilsontype fermions that leads to a bosonic action which is local in the block fields. The interaction among gauge fields on distant blocks is mediated by multiboson fields located on the boundaries of the blocks. [...]
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20170220 16:09 
[PUBDB201701039]
Journal Article
Dalla Brida, M. ; Fritzsch, P. ; Korzec, T. ; et al
Slow running of the gradient flow coupling from 200 MeV to 4 GeV in $N_f$ = 3 QCD
ddc:530
Using a finite volume gradient flow renormalization scheme with Schrödinger Functional boundary conditions, we compute the nonperturbative running coupling in the range 2.2≲$g^{2}_{GF}$(L)≲13. Careful continuum extrapolations turn out to be crucial to reach our high accuracy. [...]
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20170220 15:57 
[PUBDB201701038]
Preprint/Report
Aoki, S. ; Aoki, Y. ; Becirevic, D. ; et al
Review of lattice results concerning lowenergy particle physics
[DESY16111; CP3Origins2016023 DNRF90; DIAS201623; Edinburgh 2016/11; FTUAM1623; HIM201602; IFTUAM/CSIC16057; LPTOrsay1647; MITP/16059; RM3TH/167; ROM2F/2016/05; YITP1677; arXiv:1607.0299]
We review lattice results related to pion, kaon, D and Bmeson physics with the aim of making them easily accessible to the particle physics community. More specifically, we report on the determination of the lightquark masses, the form factor $f_+$(0), arising in the semileptonic K $\to \pi$ transition at zero momentum transfer, as well as the decay constant ratio $f_{K}/f_{\pi}$ and its consequences for the CKM matrix elements V$_{us}$ and V$_{ud}$. [...]
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20170116 07:27 
[PUBDB201700567]
Journal Article/Report/Contribution to a conference proceedings
Bahr, F. ; Banerjee, D. ; Koren, M. ; et al
Extraction of the bare form factors for the semileptonic B$_s$ decays
[DESY16251; arXiv:1701.03299]
ddc:530
The computation of the form factors for the $B_s \to K \ell \nu$ decay is presented. The b quark is treated by means of Heavy Quark Effective Theory, currently in the static approximation. [...]
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20170116 07:20 
[PUBDB201700566]
Journal Article/Report/Contribution to a conference proceedings
Bruno, M. ; Dalla Brida, M. ; Fritzsch, P. ; et al
The $\Lambda$parameter in 3flavour QCD and $\alpha_s(m_Z)$ by the ALPHA collaboration
[CERNTH2016262; DESY17007; arXiv:1701.03075]
ddc:530
We present results by the ALPHA collaboration for the $\Lambda$parameter in 3flavour QCD and the strong coupling constant at the electroweak scale, $\alpha_s(m_Z)$, in terms of hadronic quantities computed on the CLS gauge configurations. The first part of this proceedings contribution contains a review of published material \cite{Brida:2016flw,DallaBrida:2016kgh} and yields the $\Lambda$parameter in units of a low energy scale, $1/L_{\rm had}$. [...]
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20170112 08:42 
[PUBDB201700538]
Journal Article/Report/Contribution to a conference proceedings
Alexandrou, C. ; Constantinou, M. ; Hadjiyiannakou, K. ; et al
Recent results for the proton spin decomposition from lattice QCD
[DESY16175; arXiv:1609.00253]
ddc:530
The exact decomposition of the proton spin has been a much debated topic, on the experimental as well as the theoretical side. In this talk we would like to report on recent nonperturbative results and ongoing efforts to explore the proton spin from lattice QCD. [...]
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