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1.
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Intermediate window observable for the hadronic vacuum polarization contribution to the muon $g-2$ from O$(a)$ improved Wilson quarks
/ Cè, Marco (U. Bern, AEC) ; Gérardin, Antoine (Marseille, CPT) ; von Hippel, Georg (U. Mainz, PRISMA) ; Hudspith, Renwick J. (Darmstadt, Tech. Hochsch. ; Darmstadt, GSI) ; Kuberski, Simon (Helmholtz Inst., Mainz ; Darmstadt, GSI) ; Meyer, Harvey (U. Mainz, PRISMA ; Helmholtz Inst., Mainz) ; Miura, Kohtaroh (Helmholtz Inst., Mainz ; KEK, Tsukuba) ; Mohler, Daniel (Darmstadt, Tech. Hochsch. ; Darmstadt, GSI) ; Ottnad, Konstantin (U. Mainz, PRISMA) ; Paul, Srijit (U. Mainz, PRISMA) et al.
Following the publication of the new measurement of the anomalous magnetic moment of the muon, the discrepancy between experiment and the theory prediction from the $g-2$ theory initiative has increased to $4.2\,\sigma$. Recent lattice QCD calculations predict values for the hadronic vacuum polarization contribution that are larger than the data-driven estimates, bringing the Standard Model prediction closer to the experimental measurement. [...]
arXiv:2211.17083; MITP-22-102; DESY-22-193.-
2023-01-29 - 10 p.
- Published in : PoS LATTICE2022 (2023) 321
Fulltext: 2211.17083 - PDF; document - PDF;
In : 39th International Symposium on Lattice Field Theory (Lattice 2022), Bonn, Germany, 8 - 13 Aug 2022, pp.321
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2.
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Lattice Evidence for Bound Heavy Tetraquarks
/ Francis, Anthony (CERN) ; Hudspith, Renwick J (York U., Canada) ; Lewis, Randy (York U., Canada) ; Maltman, Kim (York U., Canada ; Adelaide U., Sch. Chem. Phys.)
We investigate the possibility of $qq'\bar{Q}\bar{Q}'$ tetraquark bound states using $n_f = 2 + 1$ lattice QCD with pion masses $\simeq 164, 299$ and 415 MeV. Two types of lattice interpolating operator are chosen, reflecting first diquarkantidiquark and second meson-meson structure. [...]
2019 - 6 p.
- Published in : EPJ Web Conf. 202 (2019) 06013
Fulltext: PDF;
In : The 9th International Workshop on Charm Physics (CHARM 2018), Novosibirsk, Russian Federation, 21 - 25 May 2018, pp.06013
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3.
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Hadronic light-by-light contribution to $(g-2)_\mu$ from lattice QCD: a complete calculation
/ Chao, En-Hung (U. Mainz, PRISMA ; Mainz U., Inst. Kernphys.) ; Hudspith, Renwick J (U. Mainz, PRISMA ; Mainz U., Inst. Kernphys.) ; Gérardin, Antoine (Aix-Marseille U.) ; Green, Jeremy R (CERN) ; Meyer, Harvey B (U. Mainz, PRISMA ; Mainz U., Inst. Kernphys. ; Helmholtz Inst., Mainz ; Darmstadt, GSI) ; Ottnad, Konstantin (U. Mainz, PRISMA ; Mainz U., Inst. Kernphys.)
The tension between the theoretical prediction and the experimental result of the anomalous magnetic moment of the muon, $a_\mu\equiv(g-2)_\mu/2$, is one of the long-standing puzzles of modern particle physics. After the update of the Fermilab E989 experiment in April 2021, the discrepancy between theory and experiment lies at the 4.2-sigma level. [...]
MITP-21-050.-
2022 - 10 p.
- Published in : PoS LATTICE2021 (2022) 209
Fulltext: PDF;
In : 38th International Symposium on Lattice Field Theory, Online, 26 - 30 Jul 2021, pp.209
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4.
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Window observable for the hadronic vacuum polarization contribution to the muon $g-2$ from lattice QCD
/ Cè, Marco (U. Bern, AEC ; CERN) ; Gérardin, Antoine (Marseille, CPT) ; von Hippel, Georg (U. Mainz, PRISMA) ; Hudspith, Renwick J. (Helmholtz Inst., Mainz) ; Kuberski, Simon (Helmholtz Inst., Mainz ; Darmstadt, GSI) ; Meyer, Harvey B. (U. Mainz, PRISMA ; Helmholtz Inst., Mainz) ; Miura, Kohtaroh (Helmholtz Inst., Mainz ; Nagoya U. (main)) ; Mohler, Daniel (Darmstadt, GSI ; Darmstadt, Tech. U.) ; Ottnad, Konstantin (U. Mainz, PRISMA) ; Paul Srijit (U. Mainz, PRISMA) et al.
Euclidean time windows in the integral representation of the hadronic vacuum polarization contribution to the muon $g-2$ serve to test the consistency of lattice calculations and may help in tracing the origins of a potential tension between lattice and data-driven evaluations. In this paper, we present results for the intermediate time window observable computed using O($a$) improved Wilson fermions at six values of the lattice spacings below 0.1 fm and pion masses down to the physical value. [...]
arXiv:2206.06582; MITP-22-038; CERN-TH-2022-098; DESY-22-105.-
2022-12-01 - 43 p.
- Published in : Phys. Rev. D 106 (2022) 114502
Fulltext: Publication - PDF; 2206.06582 - PDF;
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5.
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Hadronic light-by-light contribution to $(g-2)_\mu $ from lattice QCD: a complete calculation
/ Chao, En-Hung (Mainz U., Inst. Kernphys. ; U. Mainz, PRISMA) ; Hudspith, Renwick J. (Mainz U., Inst. Kernphys. ; U. Mainz, PRISMA) ; Gérardin, Antoine (Marseille, CPT) ; Green, Jeremy R. (CERN) ; Meyer, Harvey B. (Mainz U., Inst. Kernphys. ; U. Mainz, PRISMA ; Helmholtz Inst., Mainz ; Darmstadt, GSI) ; Ottnad, Konstantin (Mainz U., Inst. Kernphys. ; U. Mainz, PRISMA)
We compute the hadronic light-by-light scattering contribution to the muon $g-2$ from the up, down, and strange-quark sector directly using lattice QCD. Our calculation features evaluations of all possible Wick-contractions of the relevant hadronic four-point function and incorporates several different pion masses, volumes, and lattice-spacings. [...]
arXiv:2104.02632.-
2021-07-23 - 42 p.
- Published in : Eur. Phys. J. C 81 (2021) 651
Fulltext: 2104.02632 - PDF; document - PDF;
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6.
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A lattice investigation of exotic tetraquark channels
/ Hudspith, R.J. (U. Mainz, PRISMA) ; Colquhoun, B. (York U., Canada) ; Francis, A. (CERN) ; Lewis, R. (York U., Canada) ; Maltman, K. (York U., Canada ; Adelaide U., Sch. Chem. Phys.)
We perform an $n_f=2+1$ lattice study of a number of channels where past claims exist in the literature for the existence of strong-interaction-stable light-heavy tetraquarks. We find no evidence for any such deeply-bound states, beyond the $J^P=1^+$, $I=0$ $ud\bar{b}\bar{b}$ and $I=1/2$ $ls\bar{b}\bar{b}$ states already identified in earlier lattice studies. [...]
arXiv:2006.14294.-
2020-12-08 - 41 p.
- Published in : Phys. Rev. D 102 (2020) 114506
Article from SCOAP3: PDF; Fulltext: PDF;
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7.
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Hadronic light-by-light contribution to $(g-2)_\mu$ from lattice QCD with SU(3) flavor symmetry
/ Chao, En-Hung (U. Mainz, PRISMA) ; Gérardin, Antoine (Marseille, CPT) ; Green, Jeremy R. (CERN) ; Hudspith, Renwick J. (U. Mainz, PRISMA) ; Meyer, Harvey B. (U. Mainz, PRISMA ; Helmholtz Inst., Mainz)
We perform a lattice QCD calculation of the hadronic light-by-light contribution to $(g-2)_\mu$ at the SU(3) flavor-symmetric point $m_\pi=m_K\simeq 420\,$MeV. The representation used is based on coordinate-space perturbation theory, with all QED elements of the relevant Feynman diagrams implemented in continuum, infinite Euclidean space. [...]
arXiv:2006.16224; MITP/20-036; CERN-TH-2020-109.-
2020-09-20 - 39 p.
- Published in : Eur. Phys. J. C 80 (2020) 869
Article from SCOAP3: scoap3-fulltext - PDF; scoap - PDF; Fulltext: PDF;
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8.
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The anomalous magnetic moment of the muon in the Standard Model
/ Aoyama, T. (KEK, Tsukuba ; Nishina Ctr., RIKEN ; KMI, Nagoya) ; Asmussen, N. (Southampton U.) ; Benayoun, M. (Paris U., VI-VII) ; Bijnens, J. (Lund U.) ; Blum, T. (Connecticut U. ; RIKEN BNL) ; Bruno, M. (CERN) ; Caprini, I. (Bucharest, IFIN-HH) ; Carloni Calame, C.M. (INFN, Pavia) ; Cè, M. (CERN ; Mainz U., Inst. Phys. ; Darmstadt, GSI ; Helmholtz Inst., Mainz) ; Colangelo, G. (U. Bern, AEC) et al.
We review the present status of the Standard Model calculation of the anomalous magnetic moment of the muon. This is performed in a perturbative expansion in the fine-structure constant $\alpha$ and is broken down into pure QED, electroweak, and hadronic contributions. [...]
arXiv:2006.04822; FERMILAB-PUB-20-207-T; INT-PUB-20-021; KEK Preprint 2020-5,
MITP/20-028; KEK Preprint 2020-5, MITP/20-028; CERN-TH-2020-075; IFT-UAM/CSIC-20-74; LMU-ASC 18/20; LTH 1234,
LU TP 20-20; LTH 1234, LU TP 20-20; MAN/HEP/2020/003; PSI-PR-20-06; UWThPh 2020-14; ZU-TH 18/20.-
Geneva : CERN, 2020-12-03 - 166 p.
- Published in : Phys. Rep. 887 (2020) 1-166
Fulltext: 2006.04822 - PDF; fermilab-pub-20-207-t - PDF; Fulltext from Publisher: PDF; External links: Fermilab News article; Fermilab Library Server (fulltext available)
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9.
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Lattice predictions for bound heavy tetraquarks
/ Francis, Anthony (CERN) ; Hudspith, Renwick J (York U., Canada) ; Lewis, Randy (York U., Canada) ; Maltman, Kim (York U., Toronto (main) ; Adelaide U., Sch. Chem. Phys.)
We investigate the possibility of doubly heavy $qq^\prime \bar Q \bar Q^\prime$ tetraquark bound states using $n_f=2+1$ lattice QCD with pion masses $\simeq 164$, $299$ and $415$ MeV. Two types of lattice interpolating operator are chosen, reflecting first diquark-antidiquark and second meson-meson structure. [...]
SISSA, 2019 - 4 p.
- Published in : PoS ICHEP2018 (2019) 257
Fulltext from publisher: PDF;
In : XXXIX International Conference on High Energy Physics, Seoul, Korea, 4 - 11 Jul 2018, pp.257
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10.
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Developments in the position-space approach to the HLbL contribution to the muon $g-2$ on the lattice
/ Asmussen, Nils (Southampton U.) ; Chao, En-Hung (U. Mainz, PRISMA) ; Gérardin, Antoine (DESY, Zeuthen) ; Green, Jeremy R. (CERN) ; Hudspith, Renwick J. (U. Mainz, PRISMA) ; Meyer, Harvey B. (U. Mainz, PRISMA ; Helmholtz Inst., Mainz) ; Nyffeler, Andreas (U. Mainz, PRISMA)
The measurement of the anomalous magnetic moment of the muon and its prediction allow for a high-precision test of the Standard Model (SM). In this proceedings article we present ongoing work combining lattice QCD and continuum QED in order to determine an important SM contribution to the magnetic moment, the hadronic light-by-light contribution. [...]
arXiv:1911.05573.-
SISSA, 2019-11-28 - 7 p.
- Published in : PoS LATTICE2019 (2019) 195
Fulltext: PoS(LATTICE2019)195 - PDF; 1911.05573 - PDF;
In : 37th International Symposium on Lattice Field Theory, Wuhan, Hubei, China, 16 - 22 Jun 2019, pp.195
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