Spin-dependent Forces between Quarks in Hadrons
نویسنده
چکیده
Different mechanisms have been proposed to account for the spin-dependent interaction between quarks in ground-state hadrons. The first mechanism is the chromomagnetic interaction arising from one-gluon exchange, a second mechanism is an interaction arising from meson exchange, and a third from instanton effects. Some lattice calculations favor the first mechanism for heavy quarks and the third for light quarks. An argument is presented in favor of the one-gluon exchange mechanism. However, thus far, nobody has performed a crucial experiment that can definitively distinguish between these mechanisms.
منابع مشابه
Hypercentral Constituent Quark Model and Isospin for the Baryon Static Properties
So far the static properties of hadrons have been introduced in various models. The static properties of hadrons (charge radius, magnetic moment, etc.) are useful for understanding the quark structure of hadron. In this work we have introduced the hypercentral constituent quark and isospin dependent potentials. Here constituent quarks interact with each other via a potential in which we have ta...
متن کاملGeneralized parton distributions and strong forces inside nucleons and nuclei
We argue that generalized parton distributions (GPDs), accessible in hard exclusive processes, carry information about the spatial distribution of forces experienced by quarks and gluons inside hadrons. This way the measurements of hard exclusive processes open a possibility for direct “measurements” of strong forces in different parts of nucleons and nuclei. Also such studies open a venue for ...
متن کاملPolarized structure functions
We discuss the spin structure of quarks in hadrons, in particular the transverse spin polarization or transversity. The most direct way to probe transversity appears to be via azimuthal spin asymmetries. This brings in the role of intrinsic transverse momenta of quarks in hadrons and the study of T -odd phenomena, which are connected to single spin asymmetries. © 2005 Elsevier B.V. All rights r...
متن کاملStatic spin-dependent forces between heavy quarks in the classical approximation to dual QCD.
We compute the static spin-dependent forces Vs(R) (proportional to o-1 · o-2) and VT(R) (proportional to Jo-1 · Ro-2 · Ro-1 · o-2) between two quarks separated by R. This is done by treating the (weak) spin-dependent effects as a perturbation on the spin-independent potentials and fields computed earlier for dual QCD. What results is a definite prediction for the heavy-quark potentials which ar...
متن کاملSpin-dependent forces of quarks in baryon
Nonperturbative spin-dependent forces of quarks in a baryon are calculated directly from the QCD Lagrangian in the framework of the Field Correlator Method both for heavy and light quarks. Resulting forces contain terms of 5 different structures,only one being known before in asymptotic form.Perturbative terms obtained by the same method are standard and have different signs and structures with...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
دوره شماره
صفحات -
تاریخ انتشار 1998