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CERN Document Server 16 εγγραφές βρέθηκαν  1 - 10επόμενο  μετάβαση στην εγγραφή: Η έρευνα πήρε 0.75 δευτερόλεπτα. 
1.
$|V_{td}/V_{ts}|$ from $B\to V \gamma$ / Ball, Patricia (Durham U., IPPP ; CERN) ; Zwicky, Roman (Durham U., IPPP)
The dominant theoretical uncertainty in extracting |V_td/V_ts| from the ratio of branching ratios R=B(B->(rho,omega)gamma)/B(B->K* gamma) is given by the ratio of form factors xi=T_1^{B->K*}(0)/T_1^{B->rho}(0). We re-examine xi in the framework of QCD sum rules on the light-cone, taking into account hitherto neglected SU(3)-breaking effects. [...]
hep-ph/0603232; IPPP-06-16; DCPT-06-32; CERN-PH-TH-2006-050; CERN-PH-TH-2006-050; IPPP-2006-16.- Durham : Durham Univ., 2006 - 22 p. - Published in : JHEP 04 (2006) 046 Access to fulltext document: PDF; Fulltext: PDF; SISSA/IOP Published version, local copy: PDF; External link: Preprint
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2.
Improved Analysis of $B\to \pi e \nu$ from QCD Sum Rules on the Light-Cone / Ball, Patricia (CERN ; Durham U., IPPP) ; Zwicky, Roman (Zurich U. ; CERN)
We present a new calculation of the B->pi form-factor f_+, relevant for the measurement of |V_{ub}| from semileptonic B->pi transitions, from QCD sum rules on the light-cone. The new element is the calculation of radiative corrections to next-to-leading twist-3 accuracy. [...]
hep-ph/0110115; CERN-TH-2001-257; DCPT-01-84; IPPP-01-42; ZU-TH-36-01; CERN-TH-2001-257; DCPT-2001-84; IPPP-2001-42; ZU-TH-2001-01.- Geneva : CERN, 2001 - 12 p. - Published in : JHEP 10 (2001) 019 Access to fulltext document: 0110115 - PDF; 0110115.fig1 - PS.GZ; Fulltext: PDF; SISSA/IOP Published version, local copy: PDF; External link: Preprint - Please contact the library if you need to access this document.
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3.
A Note on Wandzura-Wilczek Relations / Ball, Patricia (Durham U. ; CERN) ; Lazar, Markus (Leipzig U.)
Wandzura-Wilczek (WW) relations between matrix-elements of bilocal light-ray operators have recently regained interest in connection with off-forward scattering processes. Originally derived for matrix elements over leading-twist operators, their generalization to off-forward and exclusive processes gets complicated by the presence of higher-twist operators that are total derivatives of leading-twist ones and do not contribute to forward-scattering. [...]
hep-ph/0103080; CERN-TH-2001-055; CERN-TH-2001-055.- Geneva : CERN, 2001 - 4 p. - Published in : Phys. Lett. B 515 (2001) 131-136 Access to fulltext document: PDF; Fulltext: PDF; External link: Preprint
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4.
Current Topics in B Physics / Ball, Patricia (CERN)
I discuss topics of particular interest in connection with the ongoing experiments at the B factories BaBar and Belle: B-mixing, QCD effects in nonleptonic decays and rare decays..
hep-ph/0010024 ; CERN-TH-2000-299 ; CERN-TH-2000-299. - 2000. - 10 p.
Preprint - Full text - Access to fulltext document - Access to fulltext document
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5.
Spontaneous CP Violation in the Left-Right-Symmetric Model / Ball, Patricia (CERN)
We investigate the pattern of CP violation in \Kd, \Bd and \Bs mixing in a symmetrical \model model with spontaneous CP violation. Performing a careful analysis of all relevant restrictions on the model's parameters from $\Delta M_K$, $\Delta M_{B_d}$, $\Delta M_{B_s}$, $\epsilon_K$, the sign of \ee and the mixing-induced CP asymmetry in \goldd, we find that the mass of the right-handed charged gauge-boson, $M_2$, is restricted to be in the range 2.75 to 13$ $TeV, and that the mass of the flavour-changing neutral-Higgs bosons, $M_H$, must be between 10.2 to 14.6$ $TeV. [...]
hep-ph/0004245.- Geneva : CERN, 2001 - 8 p. - Published in : (2000) , pp. 299-306 Access to fulltext document: PDF; Fulltext: Pages_from_C00-03-11_299 - PDF; arXiv:hep-ph_0004245 - PDF; External link: hep-ph/0004245 PDF
In : 35th Rencontres de Moriond: Electroweak Interactions and Unified Theories, Les Arcs, France, 11 - 18 Mar 2000, pp.299-306
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6.
An Analysis of $B_{s}$ Decays in the Left-Right-Symmetric Model with Spontaneous CP Violation / Ball, Patricia (CERN) ; Fleischer, Robert (DESY)
Non-leptonic B_s decays into CP eigenstates that are caused by \bar b -> \bar cc\bar s quark-level transitions, such as B_s -> D_s^+D^-_s, J/psi eta^(') or J/psi phi, provide a powerful tool to search for ``new physics'', as the CP-violating effects in these modes are tiny in the Standard Model. We explore these effects for a particular scenario of new physics, the left-right-symmetric model with spontaneous CP violation. [...]
hep-ph/9912319; CERN-TH-99-377; DESY-99-191; CERN-TH-99-377; DESY-99-191.- Geneva : CERN, 2000 - 12 p. - Published in : Phys. Lett. B 475 (2000) 111-19 Access to fulltext document: PDF; Fulltext: PDF; External link: Preprint - Please contact the library if you need to access this document.
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7.
A Comparative Study of the Decays $B \to (K,K^*) \ell^+ \ell^-$ in Standard Model and Supersymmetric Theories / Ali, Ahmed (DESY) ; Ball, Patricia (CERN) ; Handoko, L.T. (DESY ; Tangerang, Indonesian Inst. Phys.) ; Hiller, G. (Frascati ; SLAC)
Using improved theoretical calculations of the decay form factors in the Light Cone-QCD sum rule approach, we investigate the decay rates, dilepton invariant mass spectra and the forward-backward (FB) asymmetry in the decays $B \to (K,K^*) \ell^+ \ell^-$ ($\ell^\pm =e^\pm,\mu^\pm,\tau^\pm$) in the standard model (SM) and a number of popular variants of the supersymmetric (SUSY) models. Theoretical precision on the differential decay rates and FB-asymmetry is estimated in these theories taking into account various parametric uncertainties. [...]
hep-ph/9910221; SLAC-PUB-8269; DESY-99-146; CERN-TH-99-298; LNF-99-026-P; CERN-TH-99-298; DESY-99-146; LNF-99-026-P; SLAC-PUB-8269.- Geneva : CERN, 2000 - 36 p. - Published in : Phys. Rev. D 61 (2000) 074024 APS Published version, local copy: PDF; Access to fulltext document: 9910221.fig2 - PS.GZ; 9910221 - PDF; 9910221.fig1 - PS.GZ; 9910221.fig4 - PS.GZ; 9910221.fig3 - PS.GZ; Fulltext: PDF; External links: Fulltext; SLAC Document Server - Please contact the library if you need to access this document.
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8.
Anatomy of Mixing-Induced CP Asymmetries in Left-Right-Symmetric Models with Spontaneous CP Violation / Ball, Patricia (CERN) ; Frere, J.M. (Brussels U.) ; Matias, J. (CERN)
We investigate the pattern of CP violation in K, B_d and B_s mixing in a symmetrical SU(2)_R x SU(2)_L x U(1) model with spontaneous CP violation. We calculate the phases of the left and right quark mixing matrices beyond the small phase approximation and perform a careful analysis of all relevant restrictions on the model's parameters from Delta m_K, Delta m_B, epsilon, epsilon'/epsilon and the CP asymmetry in B->J/psi K_S. [...]
hep-ph/9910211; CERN-TH-99-297; ULB-TH-20; CERN-TH-99-297; ULB-TH-2000-20.- Geneva : CERN, 2000 - 34 p. - Published in : Nucl. Phys. B 572 (2000) 3-35 Access to fulltext document: PDF; Fulltext: PDF; External link: Preprint - Please contact the library if you need to access this document.
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9.
Higher Twist Distribution Amplitudes of Vector Mesons in QCD : Twist-4 Distributions and Meson Mass Corrections / Ball, Patricia (CERN) ; Braun, Vladimir M. (Nordita)
We present a systematic study of twist-4 light-cone distribution amplitudes of vector mesons in QCD, which is based on conformal expansion. The structure of meson mass corrections is studied in detail. [...]
hep-ph/9810475; CERN-TH-98-333; NORDITA-98-62-HE; CERN-TH-98-333; NORDITA-98-62-HE.- Geneva : CERN, 1999 - 38 p. - Published in : Nucl. Phys. B 543 (1999) 201 Access to fulltext document: PDF; Fulltext: PDF; External link: hep-ph/9810475 PDF - Please contact the library if you need to access this document.
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10.
Exclusive Semileptonic and Rare B Meson Decays in QCD / Ball, Patricia (CERN) ; Braun, Vladimir M. (Nordita)
We present the first complete results for the semileptonic and rare radiative form factors of B-mesons weak decay into a light vector-meson (rho, omega, K*, phi) in the light-cone sum-rule approach. The calculation includes radiative corrections, higher-twist corrections and SU(3)-breaking effects. [...]
hep-ph/9805422; CERN-TH-98-162; NORDITA-98-41-HE; CERN-TH-98-162; NORDITA-98-41-HE.- Geneva : CERN, 1998 - 36 p. - Published in : Phys. Rev. D 58 (1998) 094016/1-18 APS Published version, local copy: PDF; Access to fulltext document: 9805422.figBvec2 - PS.GZ; 9805422.figBvec1 - PS.GZ; 9805422 - PDF; Fulltext: PDF; External link: Preprint - Please contact the library if you need to access this document.
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CERN Document Server : 16 εγγραφές βρέθηκαν   1 - 10επόμενο  μετάβαση στην εγγραφή:
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68 Ball, P
1 Ball, P J
3 Ball, P.
15 Ball, Philip
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