Zobrazeno 1 - 10
of 574
pro vyhledávání: '"Stüben, H."'
Autor:
Crawford, J. A., Can, K. U., Horsley, R., Rakow, P. E. L., Schierholz, G., Stüben, H., Young, R. D., Zanotti, J. M.
Single-spin asymmetries observed in polarised deep-inelastic scattering are important probes of hadron structure. The Sivers asymmetry has been the focus of much attention in QCD phenomenology and is yet to be understood at the quark level. In this L
Externí odkaz:
http://arxiv.org/abs/2408.03621
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:
Batelaan, M., Horsley, R., Nakamura, Y., Perlt, H., Pleiter, D., Rakow, P. E. L., Schierholz, G., Stüben, H., Young, R. D., Zanotti, J. M.
Lattice QCD calculations of the nucleon electromagnetic form factors are of interest at both the high and low momentum transfer regions. For high momentum transfers especially there are open questions which require more intense study, such as the pot
Externí odkaz:
http://arxiv.org/abs/2202.01366