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http://hdl.handle.net/2445/131795| Title: | BK-parameter from Nf = 2 twisted mass lattice QCD |
| Author: | Constantinou, M. Dimopoulos, P. Frezzotti, R. Jansen, K. Gimenez, V. Lubicz, V. Mescia, Federico Panagopoulos, H. Papinutto, M. Rossi, G. C. Simula, S. Skouroupathis, A. Stylianou, F. Vladikas, A. ETM Collaboration |
| Keywords: | Física de partícules Experiments Particle physics Experiments |
| Issue Date: | 1-Jan-2011 |
| Publisher: | American Physical Society |
| Abstract: | We present an unquenched N f = 2 lattice computation of the B K parameter which controls K 0 − ¯¯¯¯ K 0 oscillations. A partially quenched setup is employed with two maximally twisted dynamical (sea) light Wilson quarks, and valence quarks of both the maximally twisted and the Osterwalder-Seiler variety. Suitable combinations of these two kinds of valence quarks lead to a lattice definition of the B K parameter which is both multiplicatively renormalizable and O ( a ) improved. Employing the nonperturbative RI-MOM scheme, in the continuum limit and at the physical value of the pion mass we get B RGI K = 0.729 ± 0.030 , a number well in line with the existing quenched and unquenched determinations. |
| Note: | Reproducció del document publicat a: https://doi.org/10.1103/PhysRevD.83.014505 |
| It is part of: | Physical Review D, 2011, vol. 83, num. 1, p. 014505 |
| URI: | http://hdl.handle.net/2445/131795 |
| Related resource: | https://doi.org/10.1103/PhysRevD.83.014505 |
| ISSN: | 1550-7998 |
| Appears in Collections: | Articles publicats en revistes (Física Quàntica i Astrofísica) Publicacions de projectes de recerca finançats per la UE |
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| File | Description | Size | Format | |
|---|---|---|---|---|
| 623813.pdf | 1.3 MB | Adobe PDF | View/Open |
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