Observation of the Muonic Decay, Ds  -&gt;    : WA75 Collaboration

Aoki, S.; Baroni, G.; Bisi, V.; Breslin, A. C.; Catanesi, M. G.; Chiba, Kazuyoshi; Davis, D. H.; Liberto, S. Di; Esten, M.J.; Gerke, Ch.; Hoshino, K.; Kazuno, M.; Kobayashi, M.; Kodama, K.; Maeda, Y.; Marzari‐Chiesa, A.; Mazzoni, M. A.; Meddi, F.; Minakawa, F.; Miyanishi, M.; Muciaccia, M. T.; Nakamura, Mitsuhiro; Nakazawa, Kimitaka; Niu, K.; Niwa, K.; Poulard, G.; Radicioni, E.; Ramello, L.; Romano, G.; Rosa, G. De; Ruggieri, F.; Sartori, Massimo; Sasaki, Hirokazu; Sato, Yoshihiro; Sgarbi, C.; Shibuya, H.; Simone, S.; Tajima, H.; Tasaka, S.; Tezuka, I.; Tovee, D.N.; Ushida, N.; Yanagisawa, Y.

doi:10.1143/ptp/89.1.131

Cited by 47 publications

(13 citation statements)

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“…To the extend that Im Π cont. can be approximated by an n-th degree polynomial these conditions lead actually to an exact cancellation of the continuum contribution to the left hand side of equation (4). The role of the D q resonance will be enhanced.…”

Section: The Methodsmentioning

confidence: 97%

“…To cope with this problem we make use of the freedom of choosing the polynomial in equation (4). We take for P (s) a polynomial of the form:…”

Section: The Methodsmentioning

confidence: 99%

“…[3]. For the D + s meson, there are several measurements of its decay constant f D + published in the last decade [4,5,6,7,8,9], with results in the range of 194 − 430 MeV. On the theoretical side, there is a recent estimate based on Borel transformed sum rules f D = 195 ± 20 MeV [10], and a preliminary result f D = 225 + 11 − 13 ± 21 MeV [11] obtained in three flavor lattice QCD.…”

Section: Introductionmentioning

confidence: 99%

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DandD_Sdecay constants from QCD duality at three loops

Bordes

Peñarrocha

Schilcher

2005

J. High Energy Phys.

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We compute the decay constants of the pseudoscalar mesons D and D s using a linear combination of finite energy sum rules which minimize the contribution of the unknown continuum spectral function. We employ the recent three loop calculation of the pseudoscalar twopoint function expanded in powers of the running charm quark mass. The theoretical uncertainties arising from the QCD asymptotic expansion are quite relevant in this case due to the relative small scale of the charm mass. We obtain the following results: f D = 177 ± 21 MeV and f Ds = 205 ± 22 MeV. These results, within the error bars, are in good agreement with estimates obtained using Borel transform QCD sum rules, but somewhat smaller than results of recent lattice computations.

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Section: The Methodsmentioning

confidence: 97%

“…To cope with this problem we make use of the freedom of choosing the polynomial in equation (4). We take for P (s) a polynomial of the form:…”

Section: The Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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DandD_Sdecay constants from QCD duality at three loops

Bordes

Peñarrocha

Schilcher

2005

J. High Energy Phys.

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“…(5) is uncertainty in the B meson decay constant f B . Although the desired quantity f B has not yet been measured directly, a number of results on the decay constant f Ds have appeared over the past few years [26][27][28][29][30]; these serve to check calculations of f B . The values of f Ds obtained by measuring the rates for D s → µν (and sometimes τ ν) are summarized in Table 2.…”

Section: B 0 −B 0 Mixingmentioning

confidence: 99%

CKM matrix and standard-model CP violation

Rosner

1997

Nuclear Physics B - Proceedings Supplements

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The currently favored model of CP violation is based on phases in the Cabibbo-Kobayashi-Maskawa (CKM) matrix describing the weak charge-changing couplings of quarks. The present status of parameters of this matrix is described. Tests of the theory, with particular emphasis on the study of B meson decays, are then noted. Some remarks are made regarding the possible origin of the baryon asymmetry of the universe; the corresponding coupling pattern of the leptons could shed light on the question. Some possibilities for non-standard physics are discussed.

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“…However, for heavy mesons only a few data with large uncertainties are available. Mark III sets an upper bound f D < 290MeV [2] while WA75 [3], CLEOII [4] and BES [5] find 225 ± 45 ± 20 ± 41 , 344 ± 37 ± 52 and 430 +150 −130 ± 40MeV for f Ds respectively. There are various quark-model, QCD sum rules and lattice calculations of these parameters [6,7,8,9].…”

mentioning

confidence: 99%

Decay constants and mixing parameters in a relativistic model for aqQ¯system

1997

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We extend our recent work, in which the Dirac equation with a "(asymptotically free) Coulomb + (Lorentz scalar γ 0 σr) linear " potential is used to obtain the light quark wavefunction for qQ mesons in the limit m Q → ∞, to estimate the decay constant f P and the mixing parameter B of the pseudoscalar mesons. We compare our results for the evolution of f P and B with the meson mass M P to the non-relativistic formulas for these quantities and show that there is a significant correction in the subasymptotic region. For σ = 0.14 GeV −2 and Λ M S = 0.240 GeV we obtain: f D = 0.371 , f Ds = 0.442 , f B = 0.301 , f Bs = 0.368 GeV and B D = 0.88 , B Ds = 0.89 , B B = 0.95 , B Bs = 0.96 , and B K = 0.60.

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Observation of the Muonic Decay, Ds -> : WA75 Collaboration

Cited by 47 publications

References 0 publications

DandD_Sdecay constants from QCD duality at three loops

DandD_Sdecay constants from QCD duality at three loops

CKM matrix and standard-model CP violation

Decay constants and mixing parameters in a relativistic model for aqQ¯system

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Observation of the Muonic Decay, Ds -> : WA75 Collaboration

Cited by 47 publications

References 0 publications

DandDSdecay constants from QCD duality at three loops

DandDSdecay constants from QCD duality at three loops

CKM matrix and standard-model CP violation

Decay constants and mixing parameters in a relativistic model for aqQ¯system

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Product

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DandD_Sdecay constants from QCD duality at three loops

DandD_Sdecay constants from QCD duality at three loops