Zobrazeno 1 - 10
of 69
pro vyhledávání: '"Horsley, Roger"'
Publikováno v:
Phys. Lett. B 849 (2024) 138429
Motivated by the similarity to QCD, specifically the property of asymptotic freedom, we simulate the dynamics of the SU(2) $\times$ SU(2) model in two dimensions using the Hybrid Monte Carlo algorithm. By introducing Fourier Acceleration, we show tha
Externí odkaz:
http://arxiv.org/abs/2308.14628
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:
Bietenholz, Wolfgang, Cundy, Nigel, Göckeler, Meinulf, Horsley, Roger, Perlt, Holger, Pleiter, Dirk, Rakow, Paul E.L., Schierholz, Gerrit, Schiller, Arwed, Streuer, T., Zanotti, Jean-Marc
Quantum Chromodynamics (QCD) is generally assumed to be the fundamental theory underlying nuclear physics. In recent years there is progress towards investigating the nucleon structure from first principles of QCD. Although this structure is best rev
Externí odkaz:
https://ul.qucosa.de/id/qucosa%3A80149
https://ul.qucosa.de/api/qucosa%3A80149/attachment/ATT-0/
https://ul.qucosa.de/api/qucosa%3A80149/attachment/ATT-0/
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
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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