Speaker
Description
Using the spectral representation of the quark propagator we study the Dirac decomposition of the gauge invariant quark propagator, whose imaginary part describes the hadronization of a quark as this interacts with the vacuum.
In light-like axial gauge, we obtain a new sum rule for the spectral function associated to the gauge fixing vector. We then demonstrate the formal gauge invariance of the so-called jet mass, that can be expressed in any gauge as the first moment of the chiral-odd quark spectral function. We also present a gauge-dependent formula that connects the second moment of the chiral-even quark spectral function to invariant mass generation and final state rescattering in the hadronization of a quark.
We finally discuss how the jet mass contributes to and can be measured in inclusive DIS and electron-positron collisions.
| Submitted on behalf of a Collaboration? | No |
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| Participate in poster competition? | No |
