Zobrazeno 1 - 10
of 51
pro vyhledávání: '"Rakow Paul"'
Autor:
Westin Alex, Kamleh Waseem, Young Ross, Zanotti James, Horsley Roger, Nakamura Yoshifumi, Perlt Holger, Rakow Paul, Schierholz Gerrit, Stüben Hinnerk
Publikováno v:
EPJ Web of Conferences, Vol 245, p 06035 (2020)
There exists a long standing discrepancy of around 3.5σ between experimental measurements and standard model calculations of the magnetic moment of the muon. Current experiments aim to reduce the experimental uncertainty by a factor of 4, and Standa
Externí odkaz:
https://doaj.org/article/8a7645f6250346d6b8385212ea394959
Autor:
Hannaford-Gunn, Alec, Sankey, Edward, Can, Kadir Utku, Horsley, Roger, Perlt, Holger, Rakow, Paul E. L., Schierholz, Gerrit, Somfleth, Kim, Stüben, Hinnerk, Young, Ross D., Zanotti, James M.
Theoretical predictions of the proton--neutron mass difference and measurements of the proton's charge radius require inputs from the Compton amplitude subtraction function. Model-dependent and non-relativistic calculations of this subtraction functi
Externí odkaz:
http://arxiv.org/abs/2207.03040
Autor:
Hannaford-Gunn, Alec, Can, Kadir Utku, Horsley, Roger, Perlt, Holder, Rakow, Paul, Schierholz, Gerrit, Stüben, Hinnerk, Young, Ross, Zanotti, James
We report on the use of Feynman-Hellmann techniques to calculate the off-forward Compton amplitude (OFCA) in lattice QCD. At leading-twist, the Euclidean OFCA is parameterised by the Mellin moments of generalised parton distributions (GPDs). Hence we
Externí odkaz:
http://arxiv.org/abs/2202.03662
Autor:
Hannaford-Gunn, Alec, Can, Kadir Utku, Horsley, Roger, Nakamura, Yoshifumi, Perlt, Holger, Rakow, Paul E. L., Stüben, Hinnerk, Schierholz, Gerrit, Young, Ross D., Zanotti, James M.
We determine the properties of generalised parton distributions (GPDs) from a lattice QCD calculation of the off-forward Compton amplitude (OFCA). By extending the Feynman-Hellmann relation to second-order matrix elements at off-forward kinematics, t
Externí odkaz:
http://arxiv.org/abs/2110.11532
Autor:
collaboration, QCDSF-UKQCD-CSSM, Horsley, Roger, Nakamura, Yoshifumi, Perlt, Holger, Rakow, Paul E. L., Schierholz, Gerrit, Somfleth, Kim, Young, Ross D., Zanotti, James M.
We have initiated a program to compute the Compton amplitude from lattice QCD with the Feynman-Hellman method. This amplitude is related to the structure function via a Fredholm integral equation of the first kind. It is known that these types of equ
Externí odkaz:
http://arxiv.org/abs/2001.05366
Autor:
Hollitt, Sophie, Horsley, Roger, Jackson, Paul D., Nakamura, Yoshifumi, Perlt, Holger, Rakow, Paul E. L., Schierholz, Gerrit, Stüben, Hinnerk, Young, Ross D., Zanotti, James M.
Early B-physics experiments have left us with a number of puzzles in heavy flavour physics. New lattice calculations (with a greater understanding of QCD effects in the Standard Model) will be needed to support the increase in experimental precision
Externí odkaz:
http://arxiv.org/abs/1811.06677
Autor:
Dragos, Jack, Horsley, Roger, Kamleh, Waseem, Leinweber, Derek B., Nakamura, Yoshifumi, Rakow, Paul E. L., Schierholz, Gerrit, Young, Ross D., Zanotti, James M.
Publikováno v:
Phys. Rev. D 94, 074505 (2016)
The extraction of hadron matrix elements in lattice QCD using the standard two- and three-point correlator functions demands careful attention to systematic uncertainties. One of the most commonly studied sources of systematic error is contamination
Externí odkaz:
http://arxiv.org/abs/1606.03195
Autor:
Dragos, Jack, Horsley, Roger, Kamleh, Waseem, Leinweber, Derek B., Nakamura, Yoshifumi, Rakow, Paul E. L., Schierholz, Gerrit, Young, Ross D., Zanotti, James M.
The extraction of hadron form factors in lattice QCD using the standard two- and three-point correlator functions has its limitations. One of the most commonly studied sources of systematic error is excited state contamination, which occurs when corr
Externí odkaz:
http://arxiv.org/abs/1511.05591
Autor:
Warkentin, Nikolaus, Braun, Vladimir M., Göckeler, Meinulf, Kaltenbrunner, Thomas, Schäfer, Andreas, Schierholz, Gerrit, Nakamura, Yoshifumi, Pleiter, Dirk, Horsley, Roger, Zanotti, James M., Rakow, Paul E. L., Stüben, Hinnerk
Publikováno v:
PoS LATTICE2008:154,2008
We compute moments of distribution amplitudes using gauge configurations with two flavors of clover fermions from QCDSF/DIK and operators which are optimized with respect to their behavior under the lattice symmetries. The knowledge of these quantiti
Externí odkaz:
http://arxiv.org/abs/0811.2212
Autor:
Brommel, Dirk, Gockeler, Meinulf, Hagler, Philipp, Horsley, Roger, Nakamura, Yoshifumi, Ohtani, Munehisa, Pleiter, Dirk, Rakow, Paul E. L., Schafer, Andreas, Schierholz, Gerrit, Schroers, Wolfram, Stuben, Hinnerk, Zanotti, James M.
Publikováno v:
Eur.Phys.J.ST162:63-71,2008
In recent years the investigation of hadron structure using lattice techniques has attracted growing attention. In this talk we give an overview on recent work with a focus on results for nucleon spectrum and structure from the QCDSF collaboration.
Externí odkaz:
http://arxiv.org/abs/0804.4706