Five-quark components in $\Delta (1232)\to N\pi$ decay

Abstract

Five-quark $qqqq\bar{q}$ components in the $\Delta (1232)$ are shown to contribute significantly to $\Delta (1232)\to N\pi$ decay through quark-antiquark annihilation transitions. These involve the overlap between the $qqq$ and $qqqq\bar{q}$ components and may be triggered by the confining interaction between the quarks. With a $\sim$ 10% admixture of five-quark components in the $\Delta (1232)$ the decay width can be larger by factors 2 - 3 over that calculated in the quark model with 3 valence quarks, depending on the details of the confining interaction. The effect of transitions between the $qqqq\bar{q}$ components themselves on the calculated decay width is however small. The large contribution of the quark-antiquark annihilation transitions thus may compensate the underprediction of the width of the $\Delta (1232)$ by the valence quark model, once the $\Delta (1232)$ contains $qqqq\bar{q}$ components with $\sim$ 10% probability.

accepted version

References in corpus (5)

• Dynamical Model of Weak Pion Production Reactions
• Baryon Magnetic Moments in Relativistic Quark Models
• Covariant calculation of mesonic baryon decays
• Scaling of Hadronic Form Factors in Point Form Kinematics
• Investigating the parity of the exotic Theta^+ baryon from the kaon photoproduction

Cited by in corpus (19)

• Study of $qqqc\bar{c}$ five quark system with three kinds of quark-quark hyperfine interaction
• D-state effects in the electromagnetic N-Delta transition
• Valence quark contribution for the gamma N -> Delta quadrupole transition extracted from lattice QCD
• The role of the $qqqq\bar{q}$ components in the electromagnetic transition ${\gamma }^{\ast }N\to N^{\ast }(1535)$
• Five-quark components in baryons
• The role of $qqqq\bar{q}$ components in the nucleon and the N(1440) resonance
• The role of $q\bar{q}$ components in the N(1440) resonance
• The $qqqq\bar{q}$ components and hidden flavor contributions to the baryon magnetic moments
• Mixing of the low-lying three- and five-quark $\Omega$ states with negative parity
• Axial $N\to \Delta (1232)$ and $N\to N^{\star }(1440)$ transition form factors
• Strong decay of low-lying $S_{11}$ and $D_{13}$ nucleon resonances to pseudoscalar mesons and octet baryons
• Role of five-quark components in radiative and strong decays of the Lambda(1405) resonance
• Spectrum of low-lying $s^{3}Q\bar{Q}$ configurations with negative parity
• Sea flavor content of octet baryons and intrinsic five-quark Fock states
• Strangeness magnetic form factor of the proton in the extended chiral quark model
• Strong decays of $N^{\ast }(1535)$ in an extended chiral quark model
• The $qqqq\bar{q}$ components and the magnetic moments of the charmed and the bottomed baryons
• The axial charges of proton within an extended chiral constituent quark model
• The quark orbital angular momentum of ground state octet baryons