Zobrazeno 1 - 10
of 474
pro vyhledávání: '"Rakow, P. E. L."'
Autor:
Hannaford-Gunn, A., Can, K. U., Crawford, J. A., Horsley, R., Rakow, P. E. L., Schierholz, G., Stüben, H., Young, R. D., Zanotti, J. M.
We present a determination of the structure functions of the off-forward Compton amplitude $\mathcal{H}_1$ and $\mathcal{E}_1$ from the Feynman-Hellmann method in lattice QCD. At leading twist, these structure functions give access to the generalised
Externí odkaz:
http://arxiv.org/abs/2405.06256
Autor:
Can, K. U., Horsley, R., Nakamura, Y., Rakow, P. E. L., Schierholz, G., Stüben, H., Young, R. D., Zanotti, J. M.
The dominant contribution to the theoretical uncertainty in the extracted weak parameters of the Standard Model comes from the hadronic uncertainties in the electroweak boxes, i.e. $\gamma-W^\pm/Z$ exchange diagrams. A dispersive analysis relates the
Externí odkaz:
http://arxiv.org/abs/2402.00255
Autor:
Can, K. U., Batelaan, M., Hannaford-Gunn, A., Horsley, R., Nakamura, Y., Perlt, H., Rakow, P. E. L., Schierholz, G., Stüben, H., Young, R. D., Zanotti, J. M.
The structure of hadrons relevant for deep-inelastic scattering are completely characterised by the Compton amplitude. A direct calculation of the Compton amplitude in a lattice QCD setup provides a way to accessing the structure functions, circumven
Externí odkaz:
http://arxiv.org/abs/2307.07904
Autor:
Batelaan, M., Can, K. U., Horsley, R., Nakamura, Y., Rakow, P. E. L., Schierholz, G., Stüben, H., Young, R. D., Zanotti, J. M.
Publikováno v:
Phys. Rev D 108, 034507 (2023)
The Feynman--Hellmann approach to computing matrix elements in lattice QCD by first adding a perturbing operator to the action is described using the transition matrix and the Dyson expansion formalism. This perturbs the energies in the two-point bar
Externí odkaz:
http://arxiv.org/abs/2305.05491
Autor:
Kordov, Z. R., Horsley, R., Kamleh, W., Nakamura, Y., Perlt, H., Rakow, P. E. L., Schierholz, G., Stüben, H., Young, R. D., Zanotti, J. M.
With increasing requirements for greater precision, it becomes essential to describe the effects of isospin breaking induced by both quark masses and electro-magnetic effects. In this work we perform a lattice analysis of the weak decay constants of
Externí odkaz:
http://arxiv.org/abs/2304.06095
Autor:
Smail, R. E., Batelaan, M., Horsley, R., Nakamura, Y., Perlt, H., Pleiter, D., Rakow, P. E. L., Schierholz, G., Stüben, H., Young, R. D., Zanotti, J. M.
At the TeV scale, low-energy precision observations of neutron characteristics provide unique probes of novel physics. Precision studies of neutron decay observables are susceptible to beyond the Standard Model (BSM) tensor and scalar interactions, w
Externí odkaz:
http://arxiv.org/abs/2304.02866
Autor:
Batelaan, M., Can, K. U., Horsley, R., Nakamura, Y., Perlt, H., Rakow, P. E. L., Schierholz, G., Stüben, H., Young, R. D., Zanotti, J. M.
Publikováno v:
PoS(LATTICE2022)412
The standard method for determining matrix elements in lattice QCD requires the computation of three-point correlation functions. This has the disadvantage of requiring two large time separations: one between the hadron source and operator and the ot
Externí odkaz:
http://arxiv.org/abs/2302.04911
Autor:
Batelaan, M., Can, K. U., Hannaford-Gunn, A., Horsley, R., Nakamura, Y., Perlt, H., Rakow, P. E. L., Schierholz, G., Stüben, H., Young, R. D., Zanotti, J. M.
We present a simultaneous extraction of the moments of $F_2$ and $F_L$ structure functions of the proton for a range of photon virtuality, $Q^2$. This is achieved by computing the forward Compton amplitude on the lattice utilizing the second-order Fe
Externí odkaz:
http://arxiv.org/abs/2209.04141
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
Wang-Landau simulations offer the possibility to integrate explicitly over a collective coordinate and stochastically over the remainder of configuration space. We propose to choose the so-called "slow mode", which is responsible for large autocorrel
Externí odkaz:
http://arxiv.org/abs/2204.04712