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Abstract For the long standing low mass puzzle of $$\Lambda _c(2940)^+$$ Λc(2940)+ , we propose an unquenched picture. Our calculation explicitly shows that the mass of the $$\Lambda _c(2P,3/2^-)$$ Λc(2P,3/2-) state can be lowered down to be consistent with the experimental data of $$\Lambda _c(2940)^+$$ Λc(2940)+ by introducing the $$D^*N$$ D∗N channel contribution. It means that the low mass puzzle of $$\Lambda _c(2940)^+$$ Λc(2940)+ can be solved. What is more important is that we predict a mass inversion relation for the 2P $$\Lambda _{c}^+$$ Λc+ states, i.e., the $$\Lambda _c(2P,1/2^-)$$ Λc(2P,1/2-) state is higher than the $$\Lambda _c(2P,3/2^-)$$ Λc(2P,3/2-) , which is totally different from the result of conventional quenched quark model. It provides a criterion to test such an unquenched scenario for $$\Lambda _c(2940)^+$$ Λc(2940)+ . We expect the future experimental progress from the LHCb and Belle II.

Patchy particles are a type of colloidalparticles with one ormore well-defined patches on the surfaces. The patchy particles withmultiple compositions and functionalities have found wide applicationsfrom the fundamental studies to practical uses. In this research patchymicelles with thiol groups in the patches were prepared based on coassemblyof free block copolymer chains and block copolymer brushes on silicaparticles. Thiol-terminated and cyanoisopropyl-capped polystyrene-block-poly(N-isopropylacrylamide) blockcopolymers (PS-b-PNIPAM-SH and PS-b-PNIPAM-CIP) were synthesized by reversible addition–fragmentationchain transfer polymerization and chemical modifications. Pyridyldisulfide-functionalized silica particles (SiO2-SS-Py)were prepared by four-step surface chemical reactions. PS-b-PNIPAM brushes on silica particles were prepared by thiol–disulfideexchange reaction between PS-b-PNIPAM-SH and SiO2-SS-Py. Surface micelles on silica particles were preparedby coassembly of PS-b-PNIPAM-CIP and block copolymerbrushes. Upon cleavage of the surface micelles from silica particles,patchy micelles with thiol groups in the patches were obtained. Dynamiclight scattering, transmission electron microscopy, and zeta-potentialmeasurements demonstrate the preparation of patchy micelles. Goldnanoparticles can be anchored onto the patchy micelles through S–Aubonds, and asymmetric hybrid structures are formed. The thiol groupscan be oxidized to disulfides, which results in directional assemblyof the patchy micelles. The self-assembly behavior of the patchy micelleswas studied experimentally and by computer simulation. [ABSTRACT FROM AUTHOR]

The anti-kaon nucleon scattering lengths resulting from a Hamiltonian effective field theory analysis of experimental data and lattice QCD studies are presented. The same Hamiltonian is then used to compute the scattering length for the K−d system, taking careful account of the effects of recoil on the energy at which the K¯N T-matrices are evaluated. These results are then used to estimate the shift and width of the 1S levels of anti-kaonic hydrogen and deuterium. The K−p result is in excellent agreement with the SIDDHARTA measurement. In the K−d case the imaginary part of the scattering length and consequently the width of the 1S state are considerably larger than found in earlier work. This is a consequence of the effect of recoil on the energy of the K¯N energy, which enhances the role of the Λ(1405) resonance.

Abstract We have systematically investigated the decuplet (T) to octet (B) baryon ($$T\rightarrow B\gamma $$ T→Bγ ) transition magnetic moments to the next-to-next-to-leading order and electric quadruple moments to the next-to-leading order in the framework of the heavy baryon chiral perturbation theory. Our calculation includes the contributions from both the intermediate decuplet and octet baryon states in the loops. Throughout our calculation, we have adopted the small-scale scheme and have not considered the 1/M recoiling corrections directly. We count the octet and decuplet baryon mass splitting $$\delta $$ δ , the small momenta p, and the pion mass $$m_{\phi }$$ mϕ as the same order small-scale parameter, which was denoted as $$\epsilon $$ ϵ . Our results for the transition magnetic moments show reasonably good convergence of the chiral expansion. The analytical expressions may be useful to the chiral extrapolation of the lattice simulations of the decuplet electromagnetic properties.

We have systematically investigated the spin-32 to spin-12 doubly charmed baryon transition magnetic moments to the next-to-next-to-leading order in the heavy baryon chiral perturbation theory (HBChPT). Numerical results of transition magnetic moments and decay widths are presented to the next-to-leading order: μΞcc⁎++→Ξcc++=−2.35μN, μΞcc⁎+→Ξcc+=1.55μN, μΩcc⁎+→Ωcc+=1.54μN, ΓΞcc⁎++→Ξcc++=22.0 keV, ΓΞcc⁎+→Ξcc+=9.57 keV, ΓΩcc⁎+→Ωcc+=9.45 keV.

Abstract In this work, we investigate the chiral corrections to the magnetic moments of the spin- $$3\over 2$$ 3 2 doubly charmed baryons systematically up to next-to-next-to-leading order with the heavy baryon chiral perturbation theory. The numerical results are given up to next-to-leading order: $$\mu _{\varXi ^{*++}_{cc}}=2.61\mu _{N}$$ μ Ξ cc ∗ + + = 2.61 μ N , $$\mu _{\varXi ^{*+}_{cc}}=-0.18\mu _{N}$$ μ Ξ cc ∗ + = - 0.18 μ N , $$\mu _{\varOmega ^{*+}_{cc}}=0.17\mu _{N}$$ μ Ω cc ∗ + = 0.17 μ N . As a by-product, we have also calculated the magnetic moments of the spin- $$3\over 2$$ 3 2 doubly bottom baryons and charmed bottom baryons: $$\mu _{\varXi ^{*0}_{bb}}=2.83\mu _{N}$$ μ Ξ bb ∗ 0 = 2.83 μ N , $$\mu _{\varXi ^{*-}_{bb}}=-1.33\mu _{N}$$ μ Ξ bb ∗ - = - 1.33 μ N , $$\mu _{\varOmega ^{*-}_{bb}}=-1.54\mu _{N}$$ μ Ω bb ∗ - = - 1.54 μ N , $$\mu _{\varXi ^{*+}_{bc}}=3.22\mu _{N}$$ μ Ξ bc ∗ + = 3.22 μ N , $$\mu _{\varXi ^{*0}_{bc}}=-0.84\mu _{N}$$ μ Ξ bc ∗ 0 = - 0.84 μ N , $$\mu _{\varOmega ^{*0}_{bc}}=-1.09\mu _{N}$$ μ Ω bc ∗ 0 = - 1.09 μ N .