315 research outputs found
BHLS and Final State Interaction~: The Decays and the Muon HVP
The departure of the latest FNAL experimental average for the muon anomalous
magnetic moment measurements having increased from to , with respect to the White Paper (WP) consensus, it
may indicate a hint for new physics. As the most delicate piece of is
its leading order HVP part , methods to ascertain its
theoretical value are crucial to interpret appropriately this departure with
the measurement. We therefore propose to examine closely the dipion spectra
from the decays in the Hidden Local
Symmetry (HLS) context using its BHLS broken variant. We thus have at
disposal a framework where the close relationship of the dipion spectra from
the and decays and of the
annihilation can be simultaneously considered. A special focus is put to the
high statistic dipion spectra from the decay collected by the KLOE/KLOE2
Collaboration and decay collected by the BESIII Collaboration. It is
shown that, once the Final State Interaction (FSI) effects are accounted for,
the BHLS framework provides a fair account of their dipion spectra. More
precisely, it is first proven that a single FSI polynomial is requested, common
to both the and dipion spectra. Moreover, it is shown that fits
involving the dipion spectra, and excluding the annihilation data, allow for a prediction of the pion form factor
data which fairly agree with the usual dipion spectra collected in
the annihilation channel. Even if more precise
dipion spectra would help to be fully conclusive, this may
already be considered as supporting the Dispersive Approach results for
The Pion Form Factor Within the Hidden Local Symmetry Model
We analyze a pion form factor formulation which fulfills the Analyticity requirement within the Hidden Local Symmetry (HLS) Model. We show that it implies an --dependent dressing of the VMD coupling and an account of several coupled channels. The corresponding function provides nice fits of the pion form factor data from to GeV. It is shown that the coupling to has little effects, while \omg \pi^0 improves significantly the fit quality below the mass. All parameters, except for the subtraction polynomial coefficients are fixed from the rest of the HLS phenomenology. The fits show consistency with the expected behaviour of at up to and with the phase shift data on from threshold to somewhat above the mass. The \omg sector is also examined in relation with recent data from CMD--2.We analyze a pion form factor formulation which fulfills the Analyticity requirement within the Hidden Local Symmetry (HLS) Model. We show that it implies an --dependent dressing of the VMD coupling and an account of several coupled channels. The corresponding function provides nice fits of the pion form factor data from to GeV. It is shown that the coupling to has little effects, while \omg \pi^0 improves significantly the fit quality below the mass. All parameters, except for the subtraction polynomial coefficients are fixed from the rest of the HLS phenomenology. The fits show consistency with the expected behaviour of at up to and with the phase shift data on from threshold to somewhat above the mass. The \omg sector is also examined in relation with recent data from CMD-2.We analyze a pion form factor formulation which fulfills the Analyticity requirement within the Hidden Local Symmetry (HLS) Model. We show that it implies an --dependent dressing of the VMD coupling and an account of several coupled channels. The corresponding function provides nice fits of the pion form factor data from to GeV. It is shown that the coupling to has little effects, while \omg \pi^0 improves significantly the fit quality below the mass. All parameters, except for the subtraction polynomial coefficients are fixed from the rest of the HLS phenomenology. The fits show consistency with the expected behaviour of at up to and with the phase shift data on from threshold to somewhat above the mass. The \omg sector is also examined in relation with recent data from CMD-2.We analyze a pion form factor formulation which fulfills the Analyticity requirement within the Hidden Local Symmetry (HLS) Model. We show that it implies an --dependent dressing of the VMD coupling and an account of several coupled channels. The corresponding function provides nice fits of the pion form factor data from to GeV. It is shown that the coupling to has little effects, while improves significantly the fit quality below the mass. All parameters, except for the subtraction polynomial coefficients are fixed from the rest of the HLS phenomenology. The fits show consistency with the expected behaviour of at up to and with the phase shift data on from threshold to somewhat above the mass. The sector is also examined in relation with recent data from CMD-2
An emotionally responsive AR art installation
In this paper, we describe a novel method of combining emotional input and an Augmented Reality (AR) tracking/display system to produce dynamic interactive art that responds to the perceived emotional content of viewer reactions and interactions. As part of the CALLAS project, our aim is to explore multimodal interaction in an Arts and Entertainment context. The approach we describe has been implemented as part of a prototype “showcase ” in collaboration with a digital artist designed to demonstrate how affective input from the audience of an interactive art installation can be used to enhance and enrich the aesthetic experience of the artistic work. We propose an affective model for combining emotionally-loaded participant input with aesthetic interpretations of interaction, together with a mapping which controls properties of dynamically generated digital art. 1
MindSpaces:Art-driven Adaptive Outdoors and Indoors Design
MindSpaces provides solutions for creating functionally and emotionally appealing architectural designs in urban spaces. Social media services, physiological sensing devices and video cameras provide data from sensing environments. State-of-the-Art technology including VR, 3D design tools, emotion extraction, visual behaviour analysis, and textual analysis will be incorporated in MindSpaces platform for analysing data and adapting the design of spaces.</p
Opposite-side flavour tagging of B mesons at the LHCb experiment
The calibration and performance of the oppositeside
flavour tagging algorithms used for the measurements
of time-dependent asymmetries at the LHCb experiment
are described. The algorithms have been developed using
simulated events and optimized and calibrated with
B
+ →J/ψK
+, B0 →J/ψK
∗0 and B0 →D
∗−
μ
+
νμ decay
modes with 0.37 fb−1 of data collected in pp collisions
at
√
s = 7 TeV during the 2011 physics run. The oppositeside
tagging power is determined in the B
+ → J/ψK
+
channel to be (2.10 ± 0.08 ± 0.24) %, where the first uncertainty
is statistical and the second is systematic
Measurement of the B0-anti-B0-Oscillation Frequency with Inclusive Dilepton Events
The - oscillation frequency has been measured with a sample of
23 million \B\bar B pairs collected with the BABAR detector at the PEP-II
asymmetric B Factory at SLAC. In this sample, we select events in which both B
mesons decay semileptonically and use the charge of the leptons to identify the
flavor of each B meson. A simultaneous fit to the decay time difference
distributions for opposite- and same-sign dilepton events gives ps.Comment: 7 pages, 1 figure, submitted to Physical Review Letter
Search for CP violation in D+→ϕπ+ and D+s→K0Sπ+ decays
A search for CP violation in D + → ϕπ + decays is performed using data collected in 2011 by the LHCb experiment corresponding to an integrated luminosity of 1.0 fb−1 at a centre of mass energy of 7 TeV. The CP -violating asymmetry is measured to be (−0.04 ± 0.14 ± 0.14)% for candidates with K − K + mass within 20 MeV/c 2 of the ϕ meson mass. A search for a CP -violating asymmetry that varies across the ϕ mass region of the D + → K − K + π + Dalitz plot is also performed, and no evidence for CP violation is found. In addition, the CP asymmetry in the D+s→K0Sπ+ decay is measured to be (0.61 ± 0.83 ± 0.14)%
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