This article reports world averages of measurements of
b
-hadron,
c
-hadron, and
τ
-lepton properties obtained by the Heavy Flavor Averaging Group using results available through summer 2016. For the ...averaging, common input parameters used in the various analyses are adjusted (rescaled) to common values, and known correlations are taken into account. The averages include branching fractions, lifetimes, neutral meson mixing parameters,
C
P
violation parameters, parameters of semileptonic decays, and Cabbibo–Kobayashi–Maskawa matrix elements.
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Abstract This article reports world averages of measurements of b-hadron, c-hadron, and $$\tau $$ τ -lepton properties obtained by the Heavy Flavor Averaging Group using results available through ...summer 2016. For the averaging, common input parameters used in the various analyses are adjusted (rescaled) to common values, and known correlations are taken into account. The averages include branching fractions, lifetimes, neutral meson mixing parameters, $$C\!P$$ C P violation parameters, parameters of semileptonic decays, and Cabbibo–Kobayashi–Maskawa matrix elements.
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The management of circumscribed choroidal hemangioma (CCH) with photodynamic therapy (PDT) using verteporfin has resulted in significant functional and clinical improvement compared with the pre-PDT ...era. Literature data on factors influencing clinical outcomes and predictors of response to PDT in symptomatic CCH are inconsistent. The aim of this study was to investigate the efficacy of PDT with verteporfin in patients with CCH depending on symptom duration and tumor thickness at baseline. We analyzed the medical records of 37 patients with symptomatic CCH divided into 3 groups according to symptom duration (≤ 50 weeks, 51 - 100 weeks, and > 100 weeks) and into 2 groups according to tumor thickness (≤ 2.3 mm and > 2.3 mm). Patients were subjected to PDT with verteporfin at a concentration of 6 mg/m
body surface area and a light dose of 50 J/cm
at a wavelength of 689 nm. The mean number of treatment sessions was 1.57 (range, 1 - 3). Tumor thickness, the transverse and longitudinal diameters of the tumor base, and best corrected visual acuity (BCVA) were evaluated at baseline and at 12 - 15 months after treatment. After PDT, the mean tumor thickness in the whole study group decreased by 1.19 ± 0.66 mm (from 3.14 mm to 1.95 mm). Subgroup analyses revealed no significant differences between the 2 groups divided according to tumor thickness (p = 0.49). However, tumor thickness differed significantly between the 3 groups divided according to symptom duration (p < 0.05). BCVA increased in 22 patients (59.5%), remained unchanged in 12 patients (16.2%), and decreased in 3 patients (10.1%). Our study provides evidence for the efficacy of PDT with verteporfin in terms of improving or stabilizing visual function as well as reducing tumor thickness in patients with CCH, including those with long-lasting disease.
This paper reports world averages of measurements of
b
-hadron,
c
-hadron, and
τ
-lepton properties obtained by the Heavy Flavour Averaging Group using results available through September 2018. In ...rare cases, significant results obtained several months later are also used. For the averaging, common input parameters used in the various analyses are adjusted (rescaled) to common values, and known correlations are taken into account. The averages include branching fractions, lifetimes, neutral meson mixing parameters,
C
P
violation parameters, parameters of semileptonic decays, and Cabibbo–Kobayashi–Maskawa matrix elements.
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This paper presents an update of the Monte Carlo event generator TAUOLA for τ lepton decays, with substantially increased list of decay channels and new initialization options. The core of the ...program is still written in FORTRAN, but necessary arrangements have been made to allow handling of the user-provided hadronic currents and matrix elements at the execution time. Such a solution allows for simple preparation of new hadronic currents. In addition the solution is useful for fitting to experimental data.
By default, TAUOLA features a set of hadronic currents which are compatible with the default initialization used by the BaBar collaboration. Options for currents available in previous releases are available through internal flags. The new version of the program also includes an implementation of Lepton Flavor Violating τ decays.
We present, as an example, a set of C++ methods for handling user-provided currents, matrix elements or new decay channels initialization.
Documentation is not only for the physicists involved in analysis of high-statistics τ decay samples, but also for future contributors, preparing new hadronic current parameterizations with different model assumptions and arrangements facilitating fits and estimates of their uncertainties. The program is now ready for migration from FORTRAN to a different programming language. Already now, it cannot be expected that user is fluent in FORTRAN. For such users, certain aspects of the project required particularly detailed documentation.
Program Title: tauola-bbb
Program Files doi:http://dx.doi.org/10.17632/7jx9ysfy7c.1
Licensing provisions: GPLv2
Programming language:FORTRAN/C++
Supplementary material: TAR BALL with benchmark results
Journal reference of previous version: Comp. Phys. Comm., 183 (2012) 821–843
Does the new version supersede the previous version?: No
Reasons for the new version: Meeting the needs of present day experiments.
Nature of problem: Present day experiments have the capability to measure extremely rare, not yet measured τ decays, as well as precise measurements of known decay channels. They require a Monte Carlo generator capable of generating all desired decays. They also need the possibility to modify and test new models for such decays. At the same time the default initialization of the MC generator should contain decent modeling of known τ decays.
Solution method: The new version is a continuation of 1, 2 and TAUOLA 3. It has an extended decay channel list with methods for modification. An initialization equivalent to heritage BaBar one is provided. A framework for adding/replacing hadronic currents/matrix elements with a user-defined function has been introduced.
Additional comments including Restrictions and Unusual features: A mixed-language environment is used, where interfacing and initialization data are placed in C++ structs, which can be accessed as F77 common blocks. The program is ready for full migration to C.
TAR BALL of the program is available from: http://annapurna.ifj.edu.pl/~jzaremba/resources/tauola-bbb.html and also from: http://wasm.web.cern.ch/wasm/f77.html
1 Z. Was and P. Golonka. Nucl. Phys. Proc. Suppl, 144:88–94, 2005. , 88(2004).
2 P. Golonka and B. Kersevan and T. Pierzchala and E. Richter-Waas and Z. Was and M. Worek Comput. Phys. Commun., 174:818-835, 2006.
3 S. Jadach, Z. Was, R. Decker, and Johann H. Kuhn. Comput. Phys. Commun., 76:361–380, 1993.
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The search for flavour-changing neutral current effects in
B
-meson decays is a powerful probe of physics beyond the Standard Model. Deviations from SM behaviour are often quantified by extracting ...the preferred values of the Wilson coefficients of an operator product expansion. We use the FlavBit module of the GAMBIT package to perform a simultaneous global fit of the Wilson coefficients
C
7
,
C
9
, and
C
10
using a combination of all current data on
b
→
s
μ
+
μ
-
transitions. We further extend previous analyses by accounting for the correlated theoretical uncertainties at each point in the Wilson coefficient parameter space, rather than deriving the uncertainties from a Standard Model calculation. We find that the best fit deviates from the SM value with a significance of 6.6
σ
. The largest deviation is associated with a vector coupling of muons to
b
and
s
quarks.
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Many models of physics beyond the standard model predict the existence of new Abelian forces with new gauge bosons mediating interactions between "dark sectors" and the standard model. We report a ...search for a dark boson Z' coupling only to the second and third generations of leptons in the reaction e super(+) e super(?)arrowrightmu super(+)mu super(?)Z',Z'arrowrightmu super(+) mu? using 514fb super(?1) of data collected by the BABAR experiment. No significant signal is observed for Z' masses in the range 0.212-10 GeV. Limits on the coupling parameter g' as low as 7x10 super(?4) are derived, leading to improvements in the bounds compared to those previously derived from neutrino experiments.
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The process e+e−→π+π−2π0γ is investigated by means of the initial-state radiation technique, where a photon is emitted from the incoming electron or positron. Using 454.3 fb−1 of data collected ...around a center-of-mass energy of s=10.58 GeV by the BABAR experiment at SLAC, approximately 150000 signal events are obtained. The corresponding nonradiative cross section is measured with a relative uncertainty of 3.6% in the energy region around 1.5 GeV, surpassing all existing measurements in precision. Using this new result, the channel’s contribution to the leading order hadronic vacuum polarization contribution to the anomalous magnetic moment of the muon is calculated as (gμπ+π−2π0−2)/2=(17.9±0.1stat±0.6syst)×10−10 in the energy range 0.85 GeV<ECM<1.8 GeV. In the same energy range, the impact on the running of the fine-structure constant at the Z0-pole is determined as Δαπ+π−2π0(MZ2)=(4.44±0.02stat±0.14syst)×10−4. Furthermore, intermediate resonances are studied and especially the cross section of the process e+e−→ωπ0→π+π−2π0 is measured.
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We study the process e + e − → e + e − η ′ in the double-tag mode and measure for the first time the γ * γ * → η ′ transition form factor F η′ ( Q 2 1 , Q 2 2 ) in the momentum-transfer range 2 < Q 2 ...1 , Q 2 2 < 60 GeV 2 . The analysis is based on a data sample corresponding to an integrated luminosity of around 469 fb − 1 collected at the PEP-II e + e − collider with the BABAR detector at center-of-mass energies near 10.6 GeV.
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