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1. B-meson semileptonic decays with highly improved staggered quarks

   https://doi.org/10.22323/1.430.0418  

   Lytle, Andrew; DeTar, Carleton; El-Khadra, Aida X; Gámiz, Elvira; Gottlieb, Steven; Jay, William; Kronfeld, Andreas; Simone, James N.; Vaquero, Alejandro (March 2023, The 39th International Symposium on Lattice Field Theory (LATTICE2022))
2. B-meson semileptonic decays from highly improved staggered quarks

   https://doi.org/10.22323/1.453.0240  

   Lytle, Andrew; DeTar, Carleton; Gámiz, Elvira; Gottlieb, Steven; Jay, William; El-Khadra, Aida X; Kronfeld, Andreas; Laiho, Jack; Simone, James N; Vaquero, Alejandro (May 2024, Sissa Medialab)
3. B- and D-meson semileptonic decays with highly improved staggered quarks

   https://doi.org/10.22323/1.396.0109  

   Jay, William; Lytle, Andrew; DeTar, Carleton; El-Khadra, Aida X; Gamiz, Elvira; Gelzer, Zechariah; Gottlieb, Steven; Kronfeld, Andreas; Simone, Jim; Vaquero, Alejandro (May 2022, The 38th International Symposium on Lattice Field Theory (LATTICE2021))

   We present results for B(s)- and D(s)-meson semileptonic decays from ongoing calculations by the Fermilab Lattice and MILC Collaborations. Our calculation employs the highly improved stag- gered quark (HISQ) action for both sea and valence quarks and includes several ensembles with physical-mass up, down, strange, and charm quarks and lattice spacings ranging from a ≈ 0.15 fm down to 0.06 fm. At most lattice spacings, an ensemble with physical-mass light quarks is included. The use of the highly improved action, combined with the MILC Collaboration’s gauge ensembles with lattice spacings down to a ≈ 0.042 fm, allows heavy valence quarks to be treated with the same discretization as the light and strange quarks. This unified treatment of the valence quarks allows (in some cases) for absolutely normalized currents, bypassing the need for perturbative matching, which has been a leading source of uncertainty in previous calculations of B-meson decay form factors by our collaboration. All preliminary form-factor results are blinded. 

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4. $$B\to D^{(*)}$$ decays from $$N_f=2+1+1$$ highly improved staggered quarks and clover $$b$$-quark in the Fermilab interpretation.

   https://doi.org/10.22323/1.466.0255  

   Butti, Pietro; DeTar, Carleton; El-Khadra, Aida X; Gámiz, Elvira; Gottlieb, Steven; Jay, William; Jeong, Hwancheol; Kronfeld, Andreas; Laiho, Jack; Lytle, Andrew; et al (February 2025, Sissa Medialab)
5. Hadronization of heavy quarks

   https://doi.org/10.1103/PhysRevC.109.054912  

   Zhao, Jiaxing; Aichelin, Jörg; Gossiaux, Pol Bernard; Beraudo, Andrea; Cao, Shanshan; Fan, Wenkai; He, Min; Minissale, Vincenzo; Song, Taesoo; Vitev, Ivan; et al (May 2024, Physical Review C)

   Heavy-flavor hadrons produced in ultrarelativistic heavy-ion collisions are a sensitive probe for studying hadronization mechanisms of the quark-gluon-plasma. In this paper, we survey how different transport models for the simulation of heavy-quark diffusion through a quark-gluon plasma in heavy-ion collisions implement hadronization and how this affects final state observables. Utilizing the same input charm-quark distribution in all models at the hadronization transition, we find that the transverse-momentum dependence of the nuclear modification factor of various charm hadron species has significant sensitivity to the hadronization scheme. In addition, the charm-hadron elliptic flow exhibits a nontrivial dependence on the elliptic flow of the hadronizing partonic medium. 

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