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CERN Document Server Znaleziono 9 rekordów  Szukanie trwało 0.62 sekund. 
1.
Some remarks on O(a) improved twisted mass QCD / Frezzotti, Roberto (Milan Bicocca U.) ; Sint, Stefan (CERN)
Twisted mass QCD (tmQCD) has been introduced as a solution to the problem of unphysical fermion zero modes in lattice QCD with quarks of the Wilson type. We here argue that O(a) improvement of the tmQCD action and simple quark bilinear operators can be more economical than in the standard framework. [...]
hep-lat/0110140; CERN-TH-2001-279; CERN-TH-2001-279.- Geneva : CERN, 2002 - 3 p. - Published in : Nucl. Phys. B, Proc. Suppl. 106 (2002) 814-816 Access to fulltext document: PDF; Fulltext: PDF; External link: Preprint
In : 19th International Symposium On Lattice Field Theory, Berlin, Germany, 19 - 24 Aug 2001, pp.814-816
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2.
Cutoff effects in twisted mass lattice QCD / Della Morte, Michele (Milan Bicocca U.) ; Frezzotti, Roberto (Milan Bicocca U. ; CERN) ; Heitger, Jochen (Munster U.) ; Sint, Stefan (CERN)
We present a first numerical study of lattice QCD with O(a) improved Wilson quarks and a chirally twisted mass term. Renormalized correlation functions are derived from the Schroedinger functional and evaluated in an intermediate space-time volume of size 0.75^3 x 1.5 fm^4. [...]
hep-lat/0108019; MS-TP-01-1; CERN-TH-2001-224; BICOCCA-FT-01-13; BICOCCA-FT-2001-13; CERN-TH-2001-224; MS-TP-2001-1.- Milano : Milano-Bicocca Univ. Phys. Dept., 2001 - 20 p. - Published in : JHEP 10 (2001) 041 Access to fulltext document: PDF; CERNREP: HTM; Fulltext: PDF; JHEP: HTM; SISSA/IOP Published version, local copy: PDF; External links: Fulltext; JHEP Electronic Journal Server
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3.
O(a) improved twisted mass lattice QCD / Frezzotti, Roberto (Milan Bicocca U. ; CERN) ; Sint, Stefan (CERN) ; Weisz, Peter (Munich, Max Planck Inst.)
Lattice QCD with Wilson quarks and a chirally twisted mass term (tmQCD) has been introduced in refs. [1,2]. [...]
hep-lat/0104014; CERN-TH-2001-014; MPI-PHT-2000-52; BICOCCA-FT-01-02; BICOCCA-FT-2001-02; CERN-TH-2001-014; MPI-PHT-2000-52.- Milano : Milano-Bicocca Univ. Phys. Dept., 2001 - 30 p. - Published in : JHEP 07 (2001) 048 Access to fulltext document: PDF; CERNREP: HTM; Fulltext: PDF; SISSA/IOP Published version, local copy: PDF; External link: Preprint - Please contact the library if you need to access this document.
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4.
Lattice QCD with a chirally twisted mass term / Frezzotti, Roberto (Milan Bicocca U.) ; Grassi, Pietro Antonio (New York U.) ; Sint, Stefan (CERN) ; Weisz, Peter (Munich, Max Planck Inst.)
Lattice QCD with Wilson quarks and a chirally twisted mass term represents a promising alternative regularization of QCD, which does not suffer from unphysical fermion zero modes. We show how the correlation functions of the renormalized theory are related to the theory with a standard parameterization of the mass term. [...]
hep-lat/0101001; CERN-TH-2000-384; MPI-PHT-2000-51; BICOCCA-FT-0027; NYU-TH-00-09-13; BICOCCA-FT-2000-27; CERN-TH-2000-384; MPI-PHT-2000-51; NYU-TH-2000-09-13.- Milano : Milano-Bicocca Univ. Phys. Dept., 2001 - 27 p. - Published in : JHEP 08 (2001) 058 Access to fulltext document: PDF; CERNREP: HTM; JHEP: HTM; Preprint: PDF; SISSA/IOP Published version, local copy: PDF; External links: Fulltext; JHEP Electronic Journal Server - CERN library copies
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5.
Comparative Benchmarks of full QCD Algorithms / Frezzotti, Roberto (Milan U.) ; Hasenbusch, Martin (Humboldt U., Berlin) ; Wolff, Ulli (Humboldt U., Berlin) ; Heitger, Jochen (DESY) ; Jansen, Karl (CERN) /ALPHA Collaboration
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. [...]
hep-lat/0009027; DESY-00-104; HU-EP-00-30; NIC-DESY-00-002; BICOCCA-FT-00-12; BICOCCA-FT-2000-12; DESY-00-002-[SIC!]; DESY-00-104; DESY-2000-002-[SIC!]; DESY-2000-104; HU-EP-2000-30.- Milano : Milano-Bicocca Univ. Phys. Dept., 2001 - 25 p. - Published in : Comput. Phys. Commun. 136 (2001) 1-13 Access to fulltext document: PDF; Fulltext: PDF; External link: hep-lat/0009027 PDF
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6.
The PHMC algorithm for simulations of dynamical fermions; 2, Performance analysis / Frezzotti, Roberto (Munich, Max Planck Inst.) ; Jansen, Karl (CERN)
We compare the performance of the PHMC algorithm with the one of the HMC algorithm in practical simulations of lattice QCD. We show that the PHMC algorithm can lead to an acceleration of numerical simulations. [...]
hep-lat/9808038; CERN-TH-98-272; MPI-PHT-98-66; CERN-TH-98-272; MPI-PHT-98-66.- Geneva : CERN, 1999 - 31 p. - Published in : Nucl. Phys. B 555 (1999) 432 Access to fulltext document: PDF; Fulltext: PDF; External link: hep-lat/9808038 PDF - Please contact the library if you need to access this document.
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7.
The PHMC algorithm for simulations of dynamical fermions; 1, description and properties / Frezzotti, Roberto (Munich, Max Planck Inst.) ; Jansen, Karl (CERN)
We give a detailed description of the so-called Polynomial Hybrid Monte Carlo (PHMC) algorithm. The effects of the correction factor, which is introduced to render the algorithm exact, are discussed, stressing their relevance for the statistical fluctuations and (almost) zero mode contributions to physical observables. [...]
hep-lat/9808011; CERN-TH-98-237; MPI-PHT-98-51; CERN-TH-98-237; MPI-PHT-98-51.- Geneva : CERN, 1999 - 49 p. - Published in : Nucl. Phys. B 555 (1999) 395 Access to fulltext document: PDF; Fulltext: PDF; External link: hep-lat/9808011 PDF - Please contact the library if you need to access this document.
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8.
Experiences with the Polynomial Hybrid Monte Carlo Algorithm / Frezzotti, Roberto (DESY) ; Jansen, Karl (CERN)
We discuss a simulation algorithm for dynamical fermions, which combines the multiboson technique with the Hybrid Monte Carlo algorithm. The algorithm turns out to give a substantial gain over standard methods in practical simulations and to be suitable for dealing with fermion zero modes in a clean and controllable way..
hep-lat/9709033; CERN-TH-97-243; CERN-TH-97-243.- Geneva : CERN, 1998 - 5 p. - Published in : Nucl. Phys. B, Proc. Suppl. 63 (1998) 943-945 Access to fulltext document: PDF; Fulltext: PDF; External link: hep-lat/9709033 PDF
In : 15th International Symposium on Lattice Field Theory : Lattice '97, Edinburgh, UK, 22 - 26 Jul 1997, pp.943-945 - Please contact the library if you need to access this document.
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9.
A Polynomial Hybrid Monte Carlo Algorithm / Frezzotti, Roberto (DESY) ; Jansen, Karl (CERN)
We present a simulation algorithm for dynamical fermions that combines the multiboson technique with the Hybrid Monte Carlo algorithm. We find that the algorithm gives a substantial gain over the standard methods in practical simulations. [...]
hep-lat/9702016; DESY-97-020; DESY-97-20; CERN-TH-97-21; DESY-97-020; CERN-TH-97-021.- Hamburg : DESY, 1997 - 12 p. - Published in : Phys. Lett. B 402 (1997) 328 Access to fulltext document: PDF; Fulltext: PDF; External link: hep-lat/9702016 PDF - Please contact the library if you need to access this document.
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