Light Scalar Meson and Decay Constant in SU(3) Gauge Theory with Eight Dynamical Flavors

Autor: Lattice Strong Dynamics Collaboration, Brower, R. C., Owen, E., Rebbi, C., Culver, C., Schaich, D., Cushman, K. K., Fleming, G. T., Gasbarro, A., Hasenfratz, A., Neil, E. T., Ingoldby, J., Jin, X. Y., Osborn, J. C., Rinaldi, E., Vranas, P., Weinberg, E., Witzel, O.

The SU(3) gauge theory with $N_f=8$ nearly massless Dirac fermions has long been of theoretical and phenomenological interest due to the near-conformality arising from its proximity to the conformal window. One particularly interesting feature is the

Externí odkaz: http://arxiv.org/abs/2306.06095

Bs → Kℓv form factors with 2+1 flavors

Autor: Liu Yuzhi, Bailey Jon A., Bazavov A., Bernard C., Bouchard C. M., DeTar C., Du Daping, El-Khadra A. X., Freeland E. D., Gámiz E., Gelzer Z., Gottlieb Steven, Heller U. M., Kronfeld A. S., Laiho J., Mackenzie P. B., Meurice Y., Neil E. T., Simone J. N., Sugar R., Toussaint D., Van de Water R. S., Zhou Ran

Publikováno v: EPJ Web of Conferences, Vol 175, p 13008 (2018)

Using the MILC 2+1 flavor asqtad quark action ensembles, we are calculating the form factors f0 and f+ for the semileptonic Bs → Kℓv decay. A total of six ensembles with lattice spacing from ≈ 0.12 to 0.06 fm are being used. At the coarsest and

Externí odkaz: https://doaj.org/article/571ad1bc79654322b785f65195a3e306

Windows on the hadronic vacuum polarisation contribution to the muon anomalous magnetic moment

Autor: Davies, C. T. H., DeTar, C., El-Khadra, A. X., Gottlieb, Steven, Hatton, D., Kronfeld, A. S., Lahert, S., Lepage, G. P., McNeile, C., Neil, E. T., Peterson, C. T., Ray, G. S., Van de Water, R. S., Vaquero, A.

An accurate determination of the leading-order hadronic vacuum polarisation (HVP) contribution to the anomalous magnetic moment of the muon is critical to understanding the size and significance of any discrepancy between the Standard Model predictio

Externí odkaz: http://arxiv.org/abs/2207.04765

Goldstone Boson Scattering with a Light Composite Scalar

Autor: Appelquist, T., Brower, R. C., Cushman, K. K., Fleming, G. T., Gasbarro, A., Hasenfratz, A., Ingoldby, J., Jin, X. Y., Kiskis, J., Neil, E. T., Osborn, J. C., Rebbi, C., Rinaldi, E., Schaich, D., Vranas, P., Weinberg, E., Witzel, O.

The appearance of a light composite $0^+$ scalar resonance in nearly conformal gauge-fermion theories motivates further study of the low energy structure of these theories. To this end, we present a nonperturbative lattice calculation of s-wave scatt

Externí odkaz: http://arxiv.org/abs/2106.13534

The anomalous magnetic moment of the muon in the Standard Model

Autor: Aoyama, T., Asmussen, N., Benayoun, M., Bijnens, J., Blum, T., Bruno, M., Caprini, I., Calame, C. M. Carloni, Cè, M., Colangelo, G., Curciarello, F., Czyż, H., Danilkin, I., Davier, M., Davies, C. T. H., Della Morte, M., Eidelman, S. I., El-Khadra, A. X., Gérardin, A., Giusti, D., Golterman, M., Gottlieb, Steven, Gülpers, V., Hagelstein, F., Hayakawa, M., Herdoíza, G., Hertzog, D. W., Hoecker, A., Hoferichter, M., Hoid, B. -L., Hudspith, R. J., Ignatov, F., Izubuchi, T., Jegerlehner, F., Jin, L., Keshavarzi, A., Kinoshita, T., Kubis, B., Kupich, A., Kupść, A., Laub, L., Lehner, C., Lellouch, L., Logashenko, I., Malaescu, B., Maltman, K., Marinković, M. K., Masjuan, P., Meyer, A. S., Meyer, H. B., Mibe, T., Miura, K., Müller, S. E., Nio, M., Nomura, D., Nyffeler, A., Pascalutsa, V., Passera, M., del Rio, E. Perez, Peris, S., Portelli, A., Procura, M., Redmer, C. F., Roberts, B. L., Sánchez-Puertas, P., Serednyakov, S., Shwartz, B., Simula, S., Stöckinger, D., Stöckinger-Kim, H., Stoffer, P., Teubner, T., Van de Water, R., Vanderhaeghen, M., Venanzoni, G., von Hippel, G., Wittig, H., Zhang, Z., Achasov, M. N., Bashir, A., Cardoso, N., Chakraborty, B., Chao, E. -H., Charles, J., Crivellin, A., Deineka, O., Denig, A., DeTar, C., Dominguez, C. A., Dorokhov, A. E., Druzhinin, V. P., Eichmann, G., Fael, M., Fischer, C. S., Gámiz, E., Gelzer, Z., Green, J. R., Guellati-Khelifa, S., Hatton, D., Hermansson-Truedsson, N., Holz, S., Hörz, B., Knecht, M., Koponen, J., Kronfeld, A. S., Laiho, J., Leupold, S., Mackenzie, P. B., Marciano, W. J., McNeile, C., Mohler, D., Monnard, J., Neil, E. T., Nesterenko, A. V., Ottnad, K., Pauk, V., Radzhabov, A. E., de Rafael, E., Raya, K., Risch, A., Rodríguez-Sánchez, A., Roig, P., José, T. San, Solodov, E. P., Sugar, R., Todyshev, K. Yu., Vainshtein, A., Avilés-Casco, A. Vaquero, Weil, E., Wilhelm, J., Williams, R., Zhevlakov, A. S.

Publikováno v: Phys. Rept. 887 (2020) 1-166

We review the present status of the Standard Model calculation of the anomalous magnetic moment of the muon. This is performed in a perturbative expansion in the fine-structure constant $\alpha$ and is broken down into pure QED, electroweak, and hadr

Externí odkaz: http://arxiv.org/abs/2006.04822