standard model of particle physics
matter field fermions (spinors, Dirac fields)
flavors of fundamental fermions in the standard model of particle physics | |||
---|---|---|---|
generation of fermions | 1st generation | 2nd generation | 3d generation |
quarks | |||
up-type | up quark | charm quark | top quark |
down-type | down quark | strange quark | bottom quark |
leptons | |||
charged | electron | muon | tauon |
neutral | electron neutrino | muon neutrino | tau neutrino |
hadron (bound states of the above quarks)
minimally extended supersymmetric standard model
bosinos:
dark matter candidates
Exotica
The fermion fundamental particles in the standard model of particle physics arrange in three “generation”. Between generations, particles differ in their mass and in further properties referred to as flavor quantum numbers, but otherwise their interactions are the same, to high accuracy. Hence flavor physics refers to the phenomenology of processes that do involve or depend on flavor quantum numbers, notably when flavor changes through interactions via the weak nuclear force and Yukawa interactions.
For the leptons these flavor quantum numbers are electron number, muon number and tauon number as well as the corresponding three neutrino numbers.
For the quarks the flavor quantum numbers are isospin, charm, strange-ness, bottom-ness and top-ness.
flavors of fundamental fermions in the standard model of particle physics | |||
---|---|---|---|
generation of fermions | 1st generation | 2nd generation | 3d generation |
quarks | |||
up-type | up quark | charm quark | top quark |
down-type | down quark | strange quark | bottom quark |
leptons | |||
charged | electron | muon | tauon |
neutral | electron neutrino | muon neutrino | tau neutrino |
See yotams for a good quick introduction.
The flavor sector of the standard model of particle physics is maybe the least well understood in detail; in any case persistent flavor anomalies reflect a discrepancy between experiment (LHCb, Belle, BaBar) and theoretical computations.
See at flavour anomalies for more.
In geometric engineering of flavor physics in intersecting D-brane models, the flavour degrees of freedom come from open strings ending on spacetime-filling D-branes (Karch-Katz 02).
Specifically in the Sakai-Sugimoto model geometrically engineering something close to actual quantum chromodynamics (Sakai-Sugimoto 04, Sakai-Sugimoto 05), flavour is encoded in the presence of D8-branes in the model:
Here we are showing
with
the 5d Chern-Simons theory on their worldvolume
the corresponding 4d WZW model on the boundary
both exhibiting the meson fields;
(see at WSS-model – Baryons);
the Yang-Mills monopole D6-branes
(see at D6-D8-brane bound state);
the NS5-branes (often not considered here).
A good quick account is in
Lecture notes:
Yuval Grossman, Introduction to flavor physics, CERN Yellow Report CERN-2010-002, pp. 111-144 (arXiv:1006.3534)
Benjamin Grinstein, TASI-2013 Lectures on Flavor Physics (arXiv:1501.05283)
Yuval Grossman, Philip Tanedo, Just a Taste: Lectures on Flavor Physics, Chapter 4 in: Anticipating the Next Discoveries in Particle Physics (TASI 2016) (arXiv:1711.03624, doi:10.1142/9789813233348_0004)
Jure Zupan, Introduction to flavour physics (arXiv:1903.05062)
See also
Wikipedia, Flavour (particle physcs)
Fernando Abreu de Souza, Gero von Gersdorff, A Random Clockwork of Flavor (arxiv:1911.08476)
Outlook on the field of flavour physics in view of LHCb-measurement of flavour anomalies
Benjamin Grinstein, A path to flavor, talk at Implications of LHCb measurement and future prospects CERN 2019 (pdf, pdf, indico:3582540)
Monika Blanke, Flavour Physics from Present to Future Colliders (arxiv:1910.10662)
geometric engineering of flavour physics in intersecting D-brane models (AdS/QCD) was originally understood in
and then developed in detail for QCD on D8-branes in the Sakai-Sugimoto model:
Tadakatsu Sakai, Shigeki Sugimoto, Low energy hadron physics in holographic QCD, Prog.Theor.Phys.113:843-882, 2005 (arXiv:hep-th/0412141)
Tadakatsu Sakai, Shigeki Sugimoto, More on a holographic dual of QCD, Prog.Theor.Phys.114:1083-1118, 2005 (arXiv:hep-th/0507073)
Last revised on November 20, 2019 at 02:38:27. See the history of this page for a list of all contributions to it.