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Quark Masses from Lattice QCD at the next-to-leading order
/ Allton, C R (Univ. degli Studi "La Sapienza", Roma ; INFN Roma) ; Ciuchini, M (Univ. degli Studi "La Sapienza", Roma ; INFN Roma) ; Crisafulli, M (Univ. degli Studi "La Sapienza", Roma ; INFN Roma) ; Franco, E (Univ. degli Studi "La Sapienza", Roma ; INFN Roma) ; Lubicz, V (Univ. degli Studi "La Sapienza", Roma ; INFN Roma) ; Martinelli, G (Univ. degli Studi "La Sapienza", Roma ; INFN Roma ; CERN)
CERN-TH-7256-94 ; ROME-P-94-1018.
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1994. - 26 p.
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Chiral behaviour of the lattice B$_{K}$-parameter with the Wilson and Clover actions at $\beta$ = 6.0
/ Crisafulli, M. (Rome U. ; INFN, Rome) ; Donini, A. (Rome U. ; INFN, Rome ; CERN) ; Lubicz, V. (Boston U.) ; Martinelli, G. (CERN) ; Rapuano, F. (Rome U. ; INFN, Rome) ; Talevi, M. (Rome U. ; INFN, Rome) ; Ungarelli, C. (Pisa U. ; INFN, Pisa) ; Vladikas, A. (INFN, Rome ; Rome U., Tor Vergata)
We present results for the kaon $B$-parameter $B_K$ from a sample of $200$ configurations using the Wilson action and $460$ configurations using the SW-Clover action, on a $18~3 \times 64$ lattice at $\beta=6.0$. We compare results obtained by renormalizing the relevant operator with different ``boosted" values of the strong coupling constant $\alpha_s$. [...]
hep-lat/9509029; BUHEP-95-26; CERN-TH-95-234; ROME-1105-95; CERN-TH-95-234; BU-HEP-95-26; ROMA-1-1105.-
Roma : Roma 1, 1996 - 10 p.
- Published in : Phys. Lett. B 369 (1996) 325-334
Access to fulltext document: PDF; Fulltext: PDF; External link: hep-lat/9509029 PDF
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Dependence of the current renormalisation constants on the quark mass
/ Crisafulli, M. (Rome U. ; INFN, Rome) ; Lubicz, V. (Rome U. ; INFN, Rome) ; Martinelli, G. (Rome U. ; INFN, Rome ; CERN) ; Vladikas, A. (Rome U., Tor Vergata ; INFN, Rome)
We study the behaviour of the vector and axial current renormalisation constants $Z_V$ and $Z_A$ as a function of the quark mass, $m_q$. We show that sizeable $O(am_q)$ and $O(g_0~2 a m_q)$ systematic effects are present in the Wilson and Clover cases respectively. [...]
hep-lat/9502012; ROME-1088-1995.-
1995 - 3 p.
Access to fulltext document: PDF; Fulltext: PDF; External link: hep-lat/9502012 PDF
In : 12th International Symposium on Lattice Field Theory, Bielefeld, Germany, 27 Sep - 1 Oct 1994, pp.400-402
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Renormalons on the lattice
/ Crisafulli, M. (INFN, Rome ; Rome U.) ; Gimenez, V. (INFN, Rome ; Rome U.) ; Martinelli, G. (INFN, Rome ; Rome U. ; CERN) ; Sachrajda, Christopher T. (Southampton U.)
We present the first lattice calculation of the B-meson binding energy \labar and of the kinetic energy \lambda_1/2 m_Q of the heavy-quark inside the pseudoscalar B-meson. In order to cancel the ambiguities due to the ultraviolet renormalons present in the operator matrix elements, this calculation has required the non-perturbative subtraction of the power divergences present in the Lagrangian operator \energy and in the kinetic energy operator \kkinetic. [...]
hep-lat/9412049.-
1994 - 4 p.
- Published in : Nucl.Phys.Proc.Suppl. 42 (1995) 315-318
Access to fulltext document: PDF; External link: hep-lat/9412049 PDF
In : 12th International Symposium on Lattice Field Theory, Bielefeld, Germany, 27 Sep - 1 Oct 1994, pp.315-318
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Lattice Calculation of D- and B-meson Semileptonic Decays, using the Clover Action at beta=6.0 on APE
/ Allton, C.R. (Rome U. ; INFN, Rome) ; Crisafulli, M. (Rome U. ; INFN, Rome) ; Lubicz, V. (Boston U.) ; Martinelli, G. (Rome U. ; INFN, Rome ; CERN) ; Rapuano, F. (Rome U. ; INFN, Rome ; CERN) ; Stella, N. (Southampton U.) ; Vladikas, A. (Rome U., Tor Vergata ; INFN, Rome) ; Bartoloni, A. (Rome U. ; INFN, Rome) ; Battista, C. (Rome U. ; INFN, Rome) ; Cabasino, S. (Rome U. ; INFN, Rome) et al.
We present the results of a high statistics lattice calculation of hadronic form factors relevant for $D-$ and $B-$meson semi-leptonic decays into light pseudoscalar and vector mesons. The results have been obtained by averaging over 170 gauge field configurations, generated in the quenched approximation, at $\beta=6.0$, on a $18^3 \times 64$ lattice, using the $O(a)$-improved SW-Clover action.From the study of the matrix element $<K^-\vert J_\mu \vert D^0>$, we obtain $f_+ (0)=0.78\pm 0.08$ and from the matrix element $<\bar K^{* 0}\vert J_\mu \vert D^+>$ we obtain $V(0)=1.08\pm 0.22$, $A_1(0)=0.67\pm 0.11$ and $A_2(0)=0.49\pm 0.34$. [...]
hep-lat/9411011; BU-HEP-94-29; CERN-TH-7484-94; ROME-1050-1994; SHEP-93-94-30; BU-HEP-94-29; CERN-TH-7484-94; ROMA-1-1050.-
Boston, MA : Boston Univ., 1995 - 15 p.
- Published in : Phys. Lett. B 345 (1995) 513-523
Access to fulltext document: th-7484-94 - PS.GZ; 9411011 - PDF; Fulltext: PDF; External link: hep-lat/9411011 PDF
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