scholarly journals Probing the internal structure of baryons

2021 ◽  
Author(s):  
Guangshun Huang ◽  
Rinaldo Baldini Ferroli
Keyword(s):  
Internal Structure ◽  
Magnetic Structure ◽  
Strong Interaction ◽  
Strange Quark ◽  
Charm Quark ◽  
Form Factors ◽  
Electromagnetic Form Factors ◽  
First Time

Abstract Electromagnetic form factors are fundamental observables that describe the electric and magnetic structure of hadrons and provide keys to understand the strong interaction. At the Beijing Spectrometer (BESIII), form factors have been measured for different baryons in the time-like region for the first time or with the best precision. The results are presented with examples focus on but not limited to the proton/neutron, the Λ, with a strange quark, and the Λc, with a charm quark.

scholarly journals Empirical Consequences of Emergent Mass

Symmetry ◽  
2020 ◽  
Vol 12 (9) ◽  
pp. 1468 ◽  
Author(s):  
Craig D. Roberts
Keyword(s):  
Standard Model ◽  
Quantum Chromodynamics ◽  
Strong Interaction ◽  
Effective Charge ◽  
Form Factors ◽  
Electromagnetic Form Factors ◽  
Parton Distributions ◽  
Atomic Nuclei ◽  
The Standard Model ◽  
High Level

The Lagrangian that defines quantum chromodynamics (QCD), the strong interaction piece of the Standard Model, appears very simple. Nevertheless, it is responsible for an astonishing array of high-level phenomena with enormous apparent complexity, e.g., the existence, number and structure of atomic nuclei. The source of all these things can be traced to emergent mass, which might itself be QCD’s self-stabilising mechanism. A background to this perspective is provided, presenting, inter alia, a discussion of the gluon mass and QCD’s process-independent effective charge and highlighting an array of observable expressions of emergent mass, ranging from its manifestations in pion parton distributions to those in nucleon electromagnetic form factors.

scholarly journals An exceptionally preserved conulariid from Ordovician erratics of Northern European Lowlands

PalZ ◽  
2021 ◽  
Author(s):  
Consuelo Sendino ◽  
Martin M. Bochmann
Keyword(s):  
Internal Structure ◽  
Late Pleistocene ◽  
Point Of View ◽  
Three Dimensions ◽  
Northern European ◽  
Current Location ◽  
Transport Direction ◽  
First Time ◽  
Erratic Boulder

AbstractA conulariid preserved in three dimensions from Ordovician fluvioglacial erratics of the Northern European Lowlands (North German Plain) is described under open nomenclature. It is assigned to the genus Conularia with similarities to Baltoscandian conulariids. The lithology of the erratic boulder and fauna contained in it provide important information on the origin and transport direction of the sediment preserved in a kame from the Saalian glaciation. This paper deals with the site of origin of the boulder in Baltoscandia analysing the comprised palaeofauna, from a palaeostratigraphic and palaeogeographic point of view, from its deposition in Ordovician times until its arrival at its current location in the Late Pleistocene. It also reveals for the first time the internal structure of the conulariid aperture.

scholarly journals Hyperon electromagnetic form factors in the timelike region

2021 ◽  
Vol 103 (1) ◽  
Author(s):  
Johann Haidenbauer ◽  
Ulf-G. Meißner ◽  
Ling-Yun Dai
Keyword(s):  
Form Factors ◽  
Electromagnetic Form Factors ◽  
Timelike Region

scholarly journals Bs → Kℓv form factors with 2+1 flavors

2018 ◽  
Vol 175 ◽  
pp. 13008 ◽  
Author(s):  
Yuzhi Liu ◽  
Jon A. Bailey ◽  
A. Bazavov ◽  
C. Bernard ◽  
C. M. Bouchard ◽  
...  
Keyword(s):  
Quark Mass ◽  
Strange Quark ◽  
Lattice Spacing ◽  
Light Quark ◽  
Form Factors ◽  
Ckm Matrix ◽  
Strange Quark Mass ◽  
Light Quark Mass ◽  
B Quark

Using the MILC 2+1 flavor asqtad quark action ensembles, we are calculating the form factors f0 and f+ for the semileptonic Bs → Kℓv decay. A total of six ensembles with lattice spacing from ≈ 0.12 to 0.06 fm are being used. At the coarsest and finest lattice spacings, the light quark mass m’l is one-tenth the strange quark mass m’s. At the intermediate lattice spacing, the ratio m’l/m’s ranges from 0.05 to 0.2. The valence b quark is treated using the Sheikholeslami-Wohlert Wilson-clover action with the Fermilab interpretation. The other valence quarks use the asqtad action. When combined with (future) measurements from the LHCb and Belle II experiments, these calculations will provide an alternate determination of the CKM matrix element |Vub|.

scholarly journals Covariant nucleon electromagnetic form factors from the Goldstone-boson-exchange quark model

2001 ◽  
Vol 511 (1) ◽  
pp. 33-39 ◽  
Author(s):  
R.F. Wagenbrunn ◽  
S. Boffi ◽  
W. Klink ◽  
W. Plessas ◽  
M. Radici
Keyword(s):  
Quark Model ◽  
Goldstone Boson ◽  
Form Factors ◽  
Electromagnetic Form Factors ◽  
Boson Exchange

Strong-interaction effects on the baryon semileptonic decay form factors

1988 ◽  
Vol 37 (11) ◽  
pp. 3197-3205 ◽  
Author(s):  
Larry J. Carson ◽  
Robert J. Oakes ◽  
Charles R. Willcox
Keyword(s):  
Strong Interaction ◽  
Semileptonic Decay ◽  
Form Factors ◽  
Interaction Effects ◽  
Decay Form

The electromagnetic form factors of the proton and quantum chromodynamics

1978 ◽  
Vol 74 (1-2) ◽  
pp. 105-107 ◽  
Author(s):  
Robert Coquereaux ◽  
Eduardo de Rafael
Keyword(s):  
Quantum Chromodynamics ◽  
Form Factors ◽  
Electromagnetic Form Factors
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