A
bstract
The first observation of the
$$ {B}_s^0 $$
B
s
0
→
(
χ
c
1
(3872)
→ J/ψπ
+
π
−
)
π
+
π
−
decay is reported using proton-proton collision data, corresponding to integrated luminosities of 1, ...2 and 6 fb
−
1
, collected by the LHCb experiment at centre-of-mass energies of 7, 8 and 13 TeV, respectively. The ratio of branching fractions relative to the
$$ {B}_s^0 $$
B
s
0
→
(
ψ
(2
S
)
→ J/ψπ
+
π
−
)
π
+
π
−
decay is measured to be
$$ \frac{\mathcal{B}\left({B}_s^0\to {\chi}_{c1}(3872){\pi}^{+}{\pi}^{-}\right)\times \mathcal{B}\left({\chi}_{c1}(3872)\to J/\psi {\pi}^{+}{\pi}^{-}\right)}{\mathcal{B}\left({B}_s^0\to \psi (2S){\pi}^{+}{\pi}^{-}\right)\times \mathcal{B}\left(\psi (2S)\to J/\psi {\pi}^{+}{\pi}^{-}\right)}=\left(6.8\pm 1.1\pm 0.2\right)\times {10}^{-2}, $$
B
B
s
0
→
χ
c
1
3872
π
+
π
−
×
B
χ
c
1
3872
→
J
/
ψ
π
+
π
−
B
B
s
0
→
ψ
2
S
π
+
π
−
×
B
ψ
2
S
→
J
/
ψ
π
+
π
−
=
6.8
±
1.1
±
0.2
×
10
−
2
,
where the first uncertainty is statistical and the second systematic. The mass spectrum of the
π
+
π
−
system recoiling against the
χ
c
1
(3872) meson exhibits a large contribution from
$$ {B}_s^0 $$
B
s
0
→ χ
c
1
(3872) (
f
0
(980)
→ π
+
π
−
) decays.
A
bstract
The first observation of the
$$ {\Lambda}_b^0\to {D}_s^{-}p $$
Λ
b
0
→
D
s
−
p
decay is presented using proton-proton collision data collected by the LHCb experiment at a centre-of-mass ...energy of
$$ \sqrt{s} $$
s
= 13 TeV, corresponding to a total integrated luminosity of 6 fb
−
1
. Using the
$$ {\Lambda}_b^0\to {\Lambda}_c^{+}{\pi}^{-} $$
Λ
b
0
→
Λ
c
+
π
−
decay as the normalisation mode, the branching fraction of the
$$ {\Lambda}_b^0\to {D}_s^{-}p $$
Λ
b
0
→
D
s
−
p
decay is measured to be
$$ \mathcal{B}\left({\Lambda}_b^0\to {D}_s^{-}p\right)=\left(12.6\pm 0.5\pm 0.3\pm 1.2\right)\times {10}^{-6} $$
B
Λ
b
0
→
D
s
−
p
=
12.6
±
0.5
±
0.3
±
1.2
×
10
−
6
, where the first uncertainty is statistical, the second systematic and the third due to uncertainties in the branching fractions of the
$$ {\Lambda}_b^0\to {\Lambda}_c^{+}{\pi}^{-} $$
Λ
b
0
→
Λ
c
+
π
−
,
$$ {D}_s^{-}\to {K}^{-}{K}^{+}{\pi}^{-} $$
D
s
−
→
K
−
K
+
π
−
and
$$ {\Lambda}_c^{+}\to p{K}^{-}{\pi}^{+} $$
Λ
c
+
→
p
K
−
π
+
decays.
The production cross-sections of (sic) mesons, namely (sic)(1S), (sic)(2S) and (sic)(3S), in pp collisions at root s = 5TeV are measured with a data sample corresponding to an integrated luminosity ...of 9.13 +/- 0.18 pb(-1) collected by the LHCb detector. The (sic) mesons are reconstructed in the decay mode (sic) -> mu(+)mu(-). Double differential cross-sections times branching fractions, as functions of the transverse momentum p(T) and the rapidity y of the (sic) mesons, are measured in the range pT < 20 GeV/ c and 2.0 < y < 4.5. The results integrated over these pT and y ranges are sigma((sic)(1S)) x B((sic)(1S) -> mu(+) mu(-)) = 2101 +/- 33 +/- 83 pb, sigma((sic)(2S)) x B((sic)(2S) -> mu(+) mu(-)) = 526 +/- 20 +/- 21 pb, sigma((sic)(3S)) x B((sic)(3S) -> mu(+) mu(-)) = 242 +/- 16 +/- 10 pb, where the first uncertainties are statistical and the second are systematic. The ratios of cross-sections between measurements of two different (sic) states and between measurements at different centre-of-mass energies are determined. The nuclear modification factor of (sic)(1S) at root s = 5TeV is updated as well using the directly measured cross-section results from this analysis.
A
bstract
A search for direct
CP
violation in the Cabibbo-suppressed decay
$$ {D}_s^{+} $$
D
s
+
→ K
−
K
+
K
+
and in the doubly Cabibbo-suppressed decay
D
+
→
K
−
K
+
K
+
is reported. The analysis ...is performed with data collected by the LHCb experiment in proton-proton collisions at a centre-of-mass energy of 13 TeV corresponding to an integrated luminosity of 5.6 fb
−
1
. The search is conducted by comparing the
$$ {D}_{(s)}^{+} $$
D
s
+
and
$$ {D}_{(s)}^{-} $$
D
s
−
Dalitz-plot distributions through a model-independent binned technique, based on fits to the
K
−
K
+
K
+
invariant-mass distributions, with a total of 0.97 (1.27) million
$$ {D}_s^{+} $$
D
s
+
(
D
+
) signal candidates. The results are given as
p
-values for the hypothesis of
CP
conservation and are found to be 13.3% for the
$$ {D}_s^{+} $$
D
s
+
→ K
−
K
+
K
+
decay and 31.6% for the
D
+
→ K
−
K
+
K
+
decay. No evidence for
CP
violation is observed in these decays.
Intradermal therapy (mesotherapy) is a technique used to inject drugs into the surface layer of the skin. The intradermal micro deposit allows to modulate the kinetics of drugs, slowing down its ...absorption and prolonging the local mechanism of action. This technique is applied in the treatment of some forms of localized pain when a systemic drug-saving effect is useful, when it is necessary to synergize with other pharmacological or non-pharmacological thera-pies, when other therapies have failed or cannot be used.
The purpose of our study was to evaluate the effect of a mixture with respect to its lower concentration. We also wanted to evaluate the number of sessions needed to reach the therapeutic goal (50% reduction in pain from baseline) in patients with acute or chronic neck pain.
We analyzed retrospectively data from 62 patients with cervicobrachial pain treated with intradermal drugs. Group A received a mixture of drugs; group B received half the dose of drugs.
Patients who received a lower concentration of drugs achieved similar results to those who received a higher dose. The therapeutic goal was achieved on average with 3.5 + 1.7 sessions on a weekly basis (min 1; max 9). Subjects in group A required 4+1.7 treatments (min 1; max 9), while subjects in group B required 3+1.5 treatments (min 1; max 7).
Our study confirms that even a lower dose of drugs can induce a clinically useful result. This study confirms that the useful effect of mesotherapy is only partly due to the pharmacological action. Further randomized prospective studies are needed to standardize the technique in the various pain syndromes, but it is recommended to follow the guidelines of the Italian Society of Mesotherapy to ensure patients receive appropriate treatment.
A metal organic framework (MOF) based on the Cu4I4DABCO2 cluster (DABCO = 1,4‐diazabicyclo2.2.2octane), MOF 1, shows bright emission with a maximum at 556 nm and an emission quantum yield of 0.53 in ...the solid state. When the large cavities of the MOF are loaded during the synthesis with different amounts of ferrocene {FeCp2, (η5‐C5H5)2FeII}, the luminescence of MOF 1 decreases with the increase in the ferrocene content, reaching an almost complete quenching for 3.5 wt.‐% of cage loading, corresponding to the complete filling of the MOF cavities. When an electric potential is applied to the FeCp2@MOF 1 deposited onto an ITO glass, the FeIICp2 is oxidised to FeIIICp2+, and the MOF 1 emission is partially switched on again, indicating that a photoinduced electron‐transfer reaction is contributing to the quenching process.
MOF 1 is made of nodes based on luminescent Cu4I4 cubane clusters and saturated amines as bridging ligands, and it is loaded with FeCp2 (η5‐C5H5)2FeII molecules, which quench the luminescence. When FeCp2 is oxidised to FeIIICp2+ the emission is partially switched on again.
Emerging services, such as high-definition Internet Protocol TV (IP-TV) or data center migration, are going to increase the amount of multicast traffic in the Internet. The support of multicast ...directly in the optical domain, instead of at the IP layer, is a target for reducing the amount of optical-electronic-optical conversions (thus, the network operational and capital expenditure) and energy consumption. In parallel, flex-grid technology (e.g., bandwidth variable wavelength selective switches) is emerging as a candidate solution to be adopted in future optical transport networks given its capacity of improving spectrum efficiency. This paper is focused on optical multicast inflex-grid optical networks and onits control through the Path Computation Element (PCE). First, we present two node architectures supporting optical multicast. The first node architecture achieves optical multicast through passive light split and requires that the multicast connection satisfies the spectrum continuity constraint. The second node architecture achieves optical multicast with frequency conversion. In particular, a specific implementation of the second architecture is proposed in this paper exploiting a periodically poled lithium niobate (PPLN) waveguide. Then, a PCE architecture to control optical multicast (with and without frequency conversion) is proposed. Optical multicasting, based on the proposed node architectures, at 100 and 200 Gb/s is experimentally demonstrated in a flex-grid network testbed. In particular, multicasting is demonstrated with 112 Gb/s polarization multiplexing 16 quadrature amplitude modulation (PM-16QAM) and polarization multiplexing quadrature phase shift keying (PM-QPSK), and with 224 Gb/s PM-16QAM considering the light-split node architecture. Moreover, optical multicast with two frequency conversions, achieved in a single PPLN device, is demonstrated for the first time with a 224 Gb/s PM-16QAM signal. The testbed also includes the PCE, which is extended to control optical multicast in flex-grid optical networks.
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