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  1. Article ; Online: Erratum to: Topical issue on Lattice Field Theory during the Covid-19 pandemic.

    Knechtli, F / Luu, T / Urbach, C

    The European physical journal. A, Hadrons and nuclei

    2022  Volume 58, Issue 3, Page(s) 47

    Abstract: This corrects the article DOI: 10.1140/epja/s10050-021-00614-5.]. ...

    Abstract [This corrects the article DOI: 10.1140/epja/s10050-021-00614-5.].
    Language English
    Publishing date 2022-03-17
    Publishing country France
    Document type Published Erratum
    ZDB-ID 1459066-9
    ISSN 1434-601X ; 1434-6001
    ISSN (online) 1434-601X
    ISSN 1434-6001
    DOI 10.1140/epja/s10050-022-00691-0
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article ; Online: Topical issue on Lattice Field Theory during the Covid-19 pandemic.

    Knechtli, F / Luu, T / Urbach, C

    The European physical journal. A, Hadrons and nuclei

    2021  Volume 57, Issue 12, Page(s) 326

    Language English
    Publishing date 2021-12-09
    Publishing country France
    Document type Editorial
    ZDB-ID 1459066-9
    ISSN 1434-601X ; 1434-6001
    ISSN (online) 1434-601X
    ISSN 1434-6001
    DOI 10.1140/epja/s10050-021-00614-5
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Book ; Online: Constrained Hybrid Monte Carlo algorithms for gauge-Higgs models

    Günther, Michael / Höllwieser, Roman / Knechtli, Francesco

    2019  

    Abstract: We develop Hybrid Monte Carlo (HMC) algorithms for constrained Hamiltonian systems of gauge- Higgs models and introduce a new observable for the constraint effective Higgs potential. We use an extension of the so-called Rattle algorithm to general ... ...

    Abstract We develop Hybrid Monte Carlo (HMC) algorithms for constrained Hamiltonian systems of gauge- Higgs models and introduce a new observable for the constraint effective Higgs potential. We use an extension of the so-called Rattle algorithm to general Hamiltonians for constrained systems, which we adapt to the 4D Abelian-Higgs model and the 5D SU(2) gauge theory on the torus and on the orbifold. The derivative of the potential is measured via the expectation value of the Lagrange multiplier for the constraint condition and allows a much more precise determination of the effective potential than conventional histogram methods. With the new method, we can access the potential over the full domain of the Higgs variable, while the histogram method is restricted to a short region around the expectation value of the Higgs field in unconstrained simulations, and the statistical precision does not deteriorate when the volume is increased. We further verify our results by comparing to the one-loop Higgs potential of the 4D Abelian-Higgs model in unitary gauge and find good agreement. To our knowledge, this is the first time this problem has been addressed for theories with gauge fields. The algorithm can also be used in four dimensions to study finite temperature and density transitions via effective Polyakov loop actions.

    Comment: added comparison to one-loop potential in section 3.3, improved text; version accepted for publication in Computer Physics Communications
    Keywords High Energy Physics - Lattice ; Computer Science - Data Structures and Algorithms
    Subject code 530
    Publishing date 2019-08-07
    Publishing country us
    Document type Book ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  4. Article ; Online: Effects of heavy sea quarks at low energies.

    Bruno, Mattia / Finkenrath, Jacob / Knechtli, Francesco / Leder, Björn / Sommer, Rainer

    Physical review letters

    2015  Volume 114, Issue 10, Page(s) 102001

    Abstract: We present a factorization formula for the dependence of light hadron masses and low energy hadronic scales on the mass M of a heavy quark: apart from an overall mass-independent factor Q, ratios such as r_{0}(M)/r_{0}(0) are computable in perturbation ... ...

    Abstract We present a factorization formula for the dependence of light hadron masses and low energy hadronic scales on the mass M of a heavy quark: apart from an overall mass-independent factor Q, ratios such as r_{0}(M)/r_{0}(0) are computable in perturbation theory at large M. The perturbation theory part is stable concerning different loop orders. Our nonperturbative Monte Carlo results obtained in a model calculation, where a doublet of heavy quarks is decoupled, match quantitatively to the perturbative prediction. Upon taking ratios of different hadronic scales at the same mass, the perturbative function drops out and the ratios are given by the decoupled theory up to M^{-2} corrections. We verify-in the continuum limit-that the sea quark effects of quarks with masses around the charm mass are very small in such ratios.
    Language English
    Publishing date 2015-03-13
    Publishing country United States
    Document type Journal Article
    ZDB-ID 208853-8
    ISSN 1079-7114 ; 0031-9007
    ISSN (online) 1079-7114
    ISSN 0031-9007
    DOI 10.1103/PhysRevLett.114.102001
    Database MEDical Literature Analysis and Retrieval System OnLINE

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    In stock of ZB MED Bonn / Germany

    Z 4' 58/153: Show issues

    Order via subito

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    Inter-library loan at ZB MED

    Your chosen title can be delivered directly to ZB MED Cologne location if you are registered as a user at ZB MED Cologne.

  5. Book: String breaking and lines of constant physics in the SU(2) Higgs model

    Knechtli, F

    (DESY / Deutsches Elektronen-Synchrotron ; 99-152)

    1999  

    Author's details F. Knechtli
    Series title DESY / Deutsches Elektronen-Synchrotron ; 99-152
    Language English
    Size 3 S, graph. Darst
    Publisher DESY
    Publishing place Hamburg u.a.
    Document type Book
    Note Unterschiede zwischen dem gedruckten Dokument und der elektronischen Dokumentversion können nicht ausgeschlossen werden
    Database Former special subject collection: coastal and deep sea fishing

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    Inter-library loan at ZB MED

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  6. Book: String breaking and lines of constant physics in the SU(2) Higgs model

    Knechtli, F

    (DESY / Deutsches Elektronen-Synchrotron ; 99-152)

    1999  

    Author's details F. Knechtli
    Series title DESY / Deutsches Elektronen-Synchrotron ; 99-152
    Language English
    Size 3 S, graph. Darst
    Publisher DESY
    Publishing place Hamburg u.a.
    Document type Book
    Note Unterschiede zwischen dem gedruckten Dokument und der elektronischen Dokumentversion können nicht ausgeschlossen werden
    Database Library catalogue of the German National Library of Science and Technology (TIB), Hannover

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    Inter-library loan at ZB MED

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  7. Book: Static potential in the SU (2) Higgs model

    Knechtli, F

    (DESY / Deutsches Elektronen-Synchrotron ; 98-125)

    1998  

    Author's details F. Knechtli
    Series title DESY / Deutsches Elektronen-Synchrotron ; 98-125
    Language English
    Size 3 Sp
    Publisher DESY
    Publishing place Zeuthen
    Document type Book
    Note Auch als elektronisches Dokument vorh. ; Unterschiede zwischen dem gedruckten Dokument und der elektronischen Dokumentversion können nicht ausgeschlossen werden
    Database Library catalogue of the German National Library of Science and Technology (TIB), Hannover

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    Inter-library loan at ZB MED

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  8. Book ; Online: String breaking and lines of constant physics in the SU(2) Higgs model

    Knechtli, F

    (DESY / Deutsches Elektronen-Synchrotron ; 99-152)

    2001  

    Author's details F. Knechtli
    Series title DESY / Deutsches Elektronen-Synchrotron ; 99-152
    Language English
    Size Online-Ressource, graph
    Edition [Elektronische Ressource]
    Publisher Universitätsbibliothek u. Technische Informationsbibliothek ; DESY
    Publishing place Hannover ; Hamburg u.a.
    Document type Book ; Online
    Note nIndex. - Differences between the printed and electronic version of the document are possible
    Database Library catalogue of the German National Library of Science and Technology (TIB), Hannover

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    Inter-library loan at ZB MED

    Your chosen title can be delivered directly to ZB MED Cologne location if you are registered as a user at ZB MED Cologne.

  9. Book ; Thesis: The static potential in the SU(2) Higgs model

    Knechtli, Francesco

    1999  

    Author's details by F. Knechtli
    Language English
    Size II, 116 Sp, graph. Darst
    Document type Book ; Thesis
    Thesis / German Habilitation thesis Humboldt-Univ., Diss.--Berlin, 1999
    Database Former special subject collection: coastal and deep sea fishing

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    Inter-library loan at ZB MED

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  10. Book ; Thesis: The static potential in the SU(2) Higgs model

    Knechtli, Francesco

    (DESY-Thesis ; 1999-031)

    1999  

    Author's details by F. Knechtli
    Series title DESY-Thesis ; 1999-031
    Keywords SU-2-Symmetrie ; Higgs-Modell
    Language English
    Size II, 106 Sp, graph. Darst
    Publisher DESY
    Publishing place Hamburg u.a.
    Document type Book ; Thesis
    Thesis / German Habilitation thesis Univ., Diss.--Berlin, 1999
    Database Former special subject collection: coastal and deep sea fishing

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    Inter-library loan at ZB MED

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