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Lattice Calculation of Short-Range Contributions to Neutrinoless Double-Beta Decay $π^-\toπ^+ ee$ at Physical Pion Mass
/ Boyle, Peter (Brookhaven ; Edinburgh U.) ; Erben, Felix (CERN) ; Feng, Xu (Peking U. ; CICQM, Beijing ; Peking U., CHEP ; Southampton U.) ; Flynn, Jonathan M. (Southampton U.) ; Garron, Nicolas (Liverpool U. ; Liverpool U., Dept. Math. ; RIKEN BNL) ; Izubuchi, Taku (Brookhaven ; Edinburgh U.) ; Jin, Luchang (Connecticut U.) ; Mukherjee, Rajnandini (Edinburgh U. ; Southampton U.) ; Tsang, J. Tobias (CERN ; Liverpool U., Dept. Math. ; RIKEN BNL) ; Tuo, Xin-Yu (Brookhaven ; Edinburgh U.)
Neutrinoless double-beta ($0νββ$) decays provide an excellent probe for determining whether neutrinos are Dirac or Majorana fermions. [...]
arXiv:2508.01900 ; CERN-TH-2025-132.
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Comparison of smoothening flows for the topological charge in QCD-like theories
/ Butti, Pietro (U. Southern Denmark, QTC) ; Della Morte, Michele (U. Southern Denmark, QTC) ; Jäger, Benjamin (U. Southern Denmark, QTC ; U. Southern Denmark, Odense, DIAS) ; Martins, Sofie (U. Southern Denmark, QTC) ; Tsang, J. Tobias (CERN)
We investigate properties of the topological charge for several SU(NC) gauge field ensembles for NC = 4, 5, 6 with a single fermion in the two-index anti-symmetric representation, covering multiple lattice spacings at otherwise approximately constant physical parameters. Comparing the topological charge defined by the Wilson flow and the over-improved DBW2 flow we find that already at small flow times the latter stabilises on discrete values. [...]
arXiv:2504.10197; CERN-TH-2025-079.-
2025-07-01 - 11 p.
- Published in : Phys. Rev. D 112 (2025) 014504
Fulltext: 2504.10197 - PDF; document - PDF;
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Kaon Physics: A Cornerstone for Future Discoveries
/ Aebischer, Jason (CERN) ; Akmete, Atakan Tugberk (U. Mainz, PRISMA) ; Aliberti, Riccardo (Mainz U., Inst. Kernphys.) ; Altmannshofer, Wolfgang (UC, Santa Cruz ; UC, Santa Cruz, Inst. Part. Phys.) ; Ambrosino, Fabio (Naples U. ; INFN, Naples ; SSM, Naples) ; Ammendola, Roberto (INFN, Rome2) ; Antonelli, Antonella (Frascati) ; Anzivino, Giuseppina (Perugia U. ; INFN, Perugia) ; Ashanujjaman, Saiyad (KIT, Karlsruhe, TTP ; KIT, Karlsruhe) ; Bandiera, Laura (INFN, Ferrara) et al.
The kaon physics programme, long heralded as a cutting-edge frontier by the European Strategy for Particle Physics, continues to stand at the intersection of discovery and innovation in high-energy physics (HEP). [...]
arXiv:2503.22256 ; CERN-TH-2025-066.
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Charm quark mass using a massive nonperturbative renormalisation scheme
/ Del Debbio, Luigi (Piemonte Orientale U., Alessandria ; INFN, Turin) ; Erben, Felix (CERN) ; Flynn, Jonathan (Southampton U.) ; Mukherjee, Rajnandini (Southampton U.) ; Tsang, J. Tobias (CERN)
We present a first numerical implementation of a massive nonperturbative renormalisation scheme, RI/mSMOM, in the study of heavy quarks using the domain-wall fermion action. In particular, we calculate renormalisation constants for fermion bilinears at non-vanishing heavy-quark masses and compare the approach to the continuum of the renormalised charm-quark mass with that from a mass-independent scheme..
arXiv:2312.16537; CERN-TH-2023-250.-
2024-05-02 - 8 p.
- Published in : PoS LATTICE2023 (2024) 294
Fulltext: 2312.16537 - PDF; document - PDF;
In : 40th International Symposium on Lattice Field Theory (Lattice 2023), Fermilab, Batavia, IL, United States, 30 Jul - 5 Aug 2023, pp.294
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Towards the super Yang-Mills spectrum at large $N_c$
/ Martins, Sofie (Odense U.) ; Della Morte, Michele (Odense U.) ; Jäger, Benjamin (Odense U.) ; Tsang, Justus Tobias (CERN) ; Ziegler, Felix Paul Gerhard (Edinburgh U.)
We examine one-flavour $SU(N_c)$ gauge theories, where $N_c$ denotes the number of colors, with one fermion in the antisymmetric representation as a candidate to approximate $\mathcal{N}=1$ super Yang Mills due to their equivalence in the large-$N_c$ limit. Summarising results on spectral evaluations of $N_c=3$, we will report on the progress of dynamical calculations for $N_c>3$. [...]
arXiv:2312.12410; CERN-TH-2023-242.-
2024-05-04 - 8 p.
- Published in : PoS LATTICE2023 (2024) 101
Fulltext: 2312.12410 - PDF; document - PDF;
In : 40th International Symposium on Lattice Field Theory (Lattice 2023), Fermilab, Batavia, IL, United States, 30 Jul - 5 Aug 2023, pp.101
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