EOS is an open-source software for a variety of computational tasks in flavor physics. Its use cases include theory predictions within and beyond the Standard Model of particle physics, Bayesian ...inference of theory parameters from experimental and theoretical likelihoods, and simulation of pseudo events for a number of signal processes. EOS ensures high-performance computations through a C++ back-end and ease of usability through a Python front-end. To achieve this flexibility, EOS enables the user to select from a variety of implementations of the relevant decay processes and hadronic matrix elements at run time. In this article, we describe the general structure of the software framework and provide basic examples. Further details and in-depth interactive examples are provided as part of the EOS online documentation.
B→K∗μ+μ- optimised observables in the MSSM Mahmoudi, Farvah; Neshatpour, Siavash; Virto, Javier
The European physical journal. C, Particles and fields,
2014/6, Letnik:
74, Številka:
6
Journal Article
Recenzirano
Odprti dostop
We provide a detailed analysis of the impact of the newly measured optimised observables in the
B
→
K
∗
μ
+
μ
-
decay by the LHCb experiment. The analysis is performed in the MSSM, both in the ...context of the usual constrained scenarios and in the context of a more general set-up where the SUSY partner masses are independent. We show that the global agreement of the MSSM solutions with the data is still very good. Nevertheless, especially in the constrained scenarios, the limits from
B
→
K
∗
μ
+
μ
-
are now very strong and are at the same level as the well-known
b
→
s
γ
constraints. We describe the implications of the
B
→
K
∗
μ
+
μ
-
measurements both on the Wilson coefficients and on the SUSY parameters.
We present a critical analysis of Padé-based methods for the unitarization of low energy amplitudes. We show that the use of certain Padé approximants to describe the resonance region may lead to ...inaccurate determinations. In particular, we find that in the (weakly coupled) Linear Sigma Model the unitarization of the low energy amplitude through the inverse amplitude method does not recover the correct values for the mass and width of the sigma. Alternative sequences of Padés are studied and we find that the diagonal sequences (i.e., N/N) have much better convergence properties.
A
bstract
We present a complete and optimal set of observables for the exclusive 4-body
meson decay
(→
Kπ
)
ℓ
+
ℓ
−
in the low dilepton mass region, that contains a maximal number of clean ...observables. This basis of observables is built in a systematic way. We show that all the previously defined observables and any observable that one can construct, can be expressed as a function of this basis. This set of observables contains all the information that can be extracted from the angular distribution in the cleanest possible way. We provide explicit expressions for the full and the uniangular distributions in terms of this basis. The conclusions presented here can be easily extended to the large-
q
2
region. We study the sensitivity of the observables to right-handed currents and scalars. Finally, we present for the first time all the symmetries of the full distribution including massive terms and scalar contributions.
Flavor physics in the quark sector Asner, D.M.; Bauer, D.; Becher, T. ...
Physics Reports,
2010, Letnik:
494, Številka:
3
Journal Article, Conference Proceeding
Recenzirano
Odprti dostop
In the past decade, one of the major challenges of particle physics has been to gain an in-depth understanding of the role of quark flavor. In this time frame, measurements and the theoretical ...interpretation of their results have advanced tremendously. A much broader understanding of flavor particles has been achieved; apart from their masses and quantum numbers, there now exist detailed measurements of the characteristics of their interactions allowing stringent tests of Standard Model predictions. Among the most interesting phenomena of flavor physics is the violation of the CP symmetry that has been subtle and difficult to explore. In the past, observations of CP violation were confined to neutral
K
mesons, but since the early 1990s, a large number of CP-violating processes have been studied in detail in neutral
B
mesons. In parallel, measurements of the couplings of the heavy quarks and the dynamics for their decays in large samples of
K
,
D
, and
B
mesons have been greatly improved in accuracy and the results are being used as probes in the search for deviations from the Standard Model.
In the near future, there will be a transition from the current to a new generation of experiments; thus a review of the status of quark flavor physics is timely. This report is the result of the work of physicists attending the 5th CKM workshop, hosted by the University of Rome “La Sapienza”, September 9–13, 2008. It summarizes the results of the current generation of experiments that are about to be completed and it confronts these results with the theoretical understanding of the field which has greatly improved in the past decade.
The recent LHCb angular analysis of the exclusive decay B→K⁎μ+μ− has indicated significant deviations from the Standard Model expectations. In order to give precise theory predictions, it is crucial ...that uncertainties from non-perturbative QCD are under control and properly included. The dominant QCD uncertainties originate from the hadronic B→K⁎ form factors and from cc‾ loops. We present a systematic method to include factorisable power corrections to the form factors in the framework of QCD factorisation and study the impact of the scheme chosen to define the soft form factors. We also discuss charm-loop effects.
To evaluate the efficacy and safety of conversion from cyclosporine to tacrolimus, we analyzed 55 kidney transplant patients who were converted due to cosmetic reasons in 42 patients, acute rejection ...in 2 patients, and other causes in 11 patients. At the doses and levels used, the development of diabetes mellitus was minimized. Disappearance of cosmetic side-effects and improvement of cardiovascular risk factors, together with conservation of renal function, encourage us to use tacrolimus as an efficacious and safe immunosuppressive therapy.
La invaginación intestinal es una causa muy poco frecuente de obstrucción intestinal en el adulto. La mayoría están causadas por lesiones malignas en la pared intestinal, siendo excepcional que se ...produzcan por metástasis. La manifestación inicial del cáncer de pulmón como metástasis en el tracto gastrointestinal es un hecho extremadamente raro. En la mayoría de los casos las metástasis se diagnostican después del tumor primario pulmonar, cuando desarrollan complicaciones potencialmente mortales como perforación, obstrucción o hemorragia, que a menudo requieren una intervención quirúrgica urgente. Independientemente del tratamiento, estos pacientes tienen un pronóstico muy sombrío dado el estado avanzado de su enfermedad. Describimos el caso un hombre de 48 años con un cuadro de obstrucción intestinal de una semana de evolución, que fue diagnosticado en el servicio de Urgencias mediante tomografía computarizada de invaginación de intestino delgado, y en radiografía simple de tórax de nódulo pulmonar sospechoso. Se decidió intervención quirúrgica urgente, realizándose resección intestinal de la zona invaginada y anastomosis, presentando un postoperatorio sin incidencias. El diagnóstico anatomopatológico fue de metástasis intestinal de carcinoma de pulmón. Se confirmó el tumor maligno primario de pulmón en estadio IV, con diseminación pulmonar, ósea, cerebral y metástasis en ambas glándulas suprarrenales. Recibió tratamiento paliativo con radioterapia y quimioterapia, falleciendo transcurridos 5 meses del diagnóstico.
Intussusception is a rare form of intestinal obstruction in adults. Most cases are caused by malignant lesions in the intestinal wall, which in exceptional cases are caused by metastases. The initial ...manifestation of lung cancer as metastasis to the gastrointestinal tract is an extremely rare event. In most cases metastases are diagnosed after the primary lung tumour, when potentially life-threatening complications such as perforation, obstruction or haemorrhage develop, often requiring emergency surgery. Regardless of treatment, these patients have very poor prognosis due to the advanced stage of their disease. The study describes the case of a 48-year-old man presenting at the emergency department with a bowel obstruction of a week's duration, who was diagnosed via CT scan with small-bowel intussusception, and via chest x-ray with a suspicious lung nodule. Emergency surgery was performed, with intestinal resection of the invaginated area and anastomosis. Postoperative recovery was uneventful. The histopathological diagnosis was intestinal metastasis from lung carcinoma. Stage IV primary malignant lung tumour was confirmed, with spread through the lungs, bones, brain and metastases in both adrenal glands. Received palliative treatment with radiation and chemotherapy, and died five months after diagnosis.
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