Featured
-
-
Article
| Open Access
Evidence for intrinsic charm quarks in the proton
Through machine learning analysis of a large set of collider data, a study disentangles intrinsic from radiatively generated charm, and finds evidence for an intrinsic charm quark within the proton wavefunction.
- Richard D. Ball
- , Alessandro Candido
- & Juan Rojo
-
Perspective |
The Higgs boson turns ten
Ten years since the discovery of the Higgs boson, the exploration of the Higgs sector, as this overview shows, has progressed far beyond original expectations, but many research questions still remain open.
- Gavin P. Salam
- , Lian-Tao Wang
- & Giulia Zanderighi
-
Article |
Leading hadronic contribution to the muon magnetic moment from lattice QCD
A precise theoretical computation of the anomalous magnetic moment of the muon based on ab initio quantum chromodynamics and quantum electrodynamics calculations is presented, which favours the existing experimental values.
- Sz. Borsanyi
- , Z. Fodor
- & L. Varnhorst
-
Article |
Constraint on the matter–antimatter symmetry-violating phase in neutrino oscillations
The T2K experiment constrains CP symmetry in neutrino oscillations, excluding 46% of possible values of the CP violating parameter at a significance of three standard deviations; this is an important milestone to test CP symmetry conservation in leptons and whether the Universe’s matter–antimatter imbalance originates from leptons.
- K. Abe
- , R. Akutsu
- & A. Zykova
-
-
Letter |
Quark-level analogue of nuclear fusion with doubly heavy baryons
Two singly charmed baryons can fuse into the recently discovered doubly charmed baryon and a neutron through an exothermic reaction analogous to the nuclear fusion between deuterium and tritium.
- Marek Karliner
- & Jonathan L. Rosner
-
Review Article |
Flavour-changing neutral currents making and breaking the standard model
The standard model of particle physics is incomplete, but experimental particle decays that occur through a ‘flavour-changing neutral current’ process, which show discrepancies to standard model predictions, may offer hints to the existence of new particles.
- F. Archilli
- , M.-O. Bettler
- & K. A. Petridis
-
Review Article |
A challenge to lepton universality in B-meson decays
Recent measurements of B-meson decays in which tau leptons are produced might challenge the standard model assumption that interactions of leptons differ only because of their different masses.
- Gregory Ciezarek
- , Manuel Franco Sevilla
- & Yutaro Sato
-
Letter |
Calculation of the axion mass based on high-temperature lattice quantum chromodynamics
The mass of the axion, a particle that is central to many dark-matter theories, is calculated via the equation of state of the Universe and the temperature dependence of the so-called topological susceptibility of quantum chromodynamics.
- S. Borsanyi
- , Z. Fodor
- & K. K. Szabo
-
Article |
Studies of pear-shaped nuclei using accelerated radioactive beams
An experimental study of certain short-lived isotopes of radon and radium has found clear octupole deformation in the nuclei of the latter — that is, these nuclei are pear-shaped; the results enable discrimination between differing theoretical approaches to octupole correlations.
- L. P. Gaffney
- , P. A. Butler
- & M. Zielinska
-
News |
Antimatter held for questioning
Magnetically trapped atoms could test fundamental physics.
- Eugenie Samuel Reich
-
News |
Collider gets yet more exotic 'to-do' list
The Large Hadron Collider could throw up evidence of new physics earlier than expected.
- Zeeya Merali
Determining the gluonic gravitational form factors of the proton
Measurability of pressure inside the proton