Abstract
AbstractBeginning with results for the leading-twist two-particle distribution amplitudes of $$\pi $$
π
- and K-mesons, each of which exhibits dilation driven by the mechanism responsible for the emergence of hadronic mass, we develop parameter-free predictions for the pointwise behaviour of all $$\pi $$
π
and K distribution functions (DFs), including glue and sea. The large-x behaviour of each DF meets expectations based on quantum chromodynamics; the valence-quark distributions match extractions from available data, including the pion case when threshold resummation effects are included; and at $$\zeta _5=5.2\,$$
ζ
5
=
5.2
GeV, the scale of existing measurements, the light-front momentum of these hadrons is shared as follows: $$\langle x_{\mathrm{valence}} \rangle ^\pi = 0.41(4)$$
⟨
x
valence
⟩
π
=
0.41
(
4
)
, $$\langle x_{\mathrm{glue}} \rangle ^\pi = 0.45(2)$$
⟨
x
glue
⟩
π
=
0.45
(
2
)
, $$\langle x_{\mathrm{sea}} \rangle ^\pi = 0.14(2)$$
⟨
x
sea
⟩
π
=
0.14
(
2
)
; and $$\langle x_{\mathrm{valence}} \rangle ^K = 0.42(3)$$
⟨
x
valence
⟩
K
=
0.42
(
3
)
, $$\langle x_{\mathrm{glue}} \rangle ^K = 0.44(2)$$
⟨
x
glue
⟩
K
=
0.44
(
2
)
, $$\langle x_{\mathrm{sea}} \rangle ^K = 0.14(2)$$
⟨
x
sea
⟩
K
=
0.14
(
2
)
. The kaon’s glue and sea distributions are similar to those in the pion, although the inclusion of mass-dependent splitting functions introduces some differences on the valence-quark domain. This study should stimulate improved analyses of existing data and motivate new experiments sensitive to all $$\pi $$
π
and K DFs. With little known empirically about the structure of the Standard Model’s (pseudo-) Nambu-Goldstone modes and analyses of existing, limited data being controversial, it is likely that new generation experiments at upgraded and anticipated facilities will provide the information needed to resolve the puzzles and complete the picture of these complex bound states.
Publisher
Springer Science and Business Media LLC
Subject
Physics and Astronomy (miscellaneous),Engineering (miscellaneous)
Reference131 articles.
1. G. Aad et al., Phys. Lett. B 716, 1 (2012)
2. S. Chatrchyan et al., Phys. Lett. B 716, 30 (2012)
3. J. Ellis, Phil. Trans. Roy. Soc. Lond. A 370, 818 (2012)
4. H.A. Chawdhry, M.A. Lim, A. Mitov, Phys. Rev. D 99, 076011 (2019)
5. P. Hägler, Phys. Rept. 490, 49 (2010)
Cited by
71 articles.
订阅此论文施引文献
订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献