A
bstract
Results on the transverse spherocity dependence of light-flavor particle production (
π
, K, p,
ϕ
, K
*0
,
K
S
0
, Λ, Ξ) at midrapidity in high-multiplicity pp collisions at
s
= 13 TeV were ...obtained with the ALICE apparatus. The transverse spherocity estimator
S
O
p
T
=
1
categorizes events by their azimuthal topology. Utilizing narrow selections on
S
O
p
T
=
1
, it is possible to contrast particle production in collisions dominated by many soft initial interactions with that observed in collisions dominated by one or more hard scatterings. Results are reported for two multiplicity estimators covering different pseudorapidity regions. The
S
O
p
T
=
1
estimator is found to effectively constrain the hardness of the events when the midrapidity (|
η
| < 0.8) estimator is used.
The production rates of strange particles are found to be slightly higher for soft isotropic topologies, and severely suppressed in hard jet-like topologies. These effects are more pronounced for hadrons with larger mass and strangeness content, and observed when the topological selection is done within a narrow multiplicity interval. This demonstrates that an important aspect of the universal scaling of strangeness enhancement with final-state multiplicity is that high-multiplicity collisions are dominated by soft, isotropic processes. On the contrary, strangeness production in events with jet-like processes is significantly reduced.
The results presented in this article are compared with several QCD-inspired Monte Carlo event generators. Models that incorporate a two-component phenomenology, either through mechanisms accounting for string density, or thermal production, are able to describe the observed strangeness enhancement as a function of
S
O
p
T
=
1
.
A
bstract
Measurements of inclusive charged-particle jet production in pp and p-Pb collisions at center-of-mass energy per nucleon-nucleon collision
s
NN
= 5
.
02 TeV and the corresponding nuclear ...modification factor
R
pPb
ch
jet
are presented, using data collected with the ALICE detector at the LHC. Jets are reconstructed in the central rapidity region |
η
jet
|
<
0
.
5 from charged particles using the anti-
k
T
algorithm with resolution parameters
R
= 0
.
2, 0
.
3, and 0
.
4. The
p
T
-differential inclusive production cross section of charged-particle jets, as well as the corresponding cross section ratios, are reported for pp and p-Pb collisions in the transverse momentum range 10
<
p
T
,
jet
ch
<
140 GeV/
c
and 10
<
p
T
,
jet
ch
<
160 GeV/
c
, respectively, together with the nuclear modification factor
R
pPb
ch
jet
in the range 10
<
p
T
,
jet
ch
<
140 GeV/
c
. The analysis extends the
p
T
range of the previously-reported charged-particle jet measurements by the ALICE Collaboration. The nuclear modification factor is found to be consistent with one and independent of the jet resolution parameter with the improved precision of this study, indicating that the possible influence of cold nuclear matter effects on the production cross section of charged-particle jets in p-Pb collisions at
s
NN
= 5
.
02 TeV is smaller than the current precision. The obtained results are in agreement with other minimum bias jet measurements available for RHIC and LHC energies, and are well reproduced by the NLO perturbative QCD P
owheg
calculations with parton shower provided by P
ythia
8 as well as by J
etscape
simulations.
Key message
Recent research has unveiled that the ZmMKK9–ZmMPK20–ZmRIN2 cascade plays a role in suppressing stomatal opening induced by high temperatures and is a significant contributor to enhancing ...thermotolerance in plants.
The standard model of cosmology (
Λ
CDM) is facing a serious crisis caused by the inconsistencies in the measurements of some fundamental cosmological parameters (Hubble constant
H
0
and cosmic ...curvature parameter
Ω
k
for example). On the other hand, a strictly linear evolution of the cosmological scale factor is found to be an excellent fit to a host of observations. Any model that can support such a coasting presents itself as a falsifiable model as far as the cosmological tests are concerned. In this article, the observational data of strong gravitational lensing (SGL) systems from SLACS, BELLS, LSD and SL2S surveys has been used to test the viability of linearly coasting cosmology. Assuming the spherically symmetric mass distribution in lensing galaxies, the ratio of angular diameter distance from lens to source and angular diameter distance of the source is evaluated and is used to constrain the power law cosmology. Further, updated type-Ia supernovae data set (Pantheon
+
) with covariance matrix incorporating all statistical and systematic uncertainties is used to constrain the power law cosmology. It is found that the linear coasting is consistent with the SGL data within 1-
σ
uncertainties but Pantheon
+
sample does not support linear coasting.
Cesium lead halide pervoskite semiconductors are being extensively studied due to unprecedentedly high luminescence efficiency and concomitant narrow emission line width. Here, we report ...photophysical properties of CsPbBr3 quantum dots having different sizes. Notably 5.5 nm sized CsPbBr3 quantum dots reveal 95% photoluminescence (PL) quantum yield at room temperature. Moreover, signature of the stimulated emission is observed at low temperature for excitation fluence as low as ∼4.16 μW (Xe lamp excitation). Even though CsPbBr3 quantum dots reveal the red shift in band gap at low temperature, similar to the single crystal, the exciton–phonon interaction is profoundly affected by the quantum size effects. Temperature-dependent optical studies reveal an anomalous decrease in exciton-LO phonon coupling in small-sized quantum dots aside from expected higher exciton binding energy. Observed stimulated emission in low-sized CsPbBr3 quantum dots has implications in realizing a quantum dot based laser.
Dengue is a serious global health concern especially in tropical and subtropical countries. About 2.5 billion of the world’s population is at risk for dengue infection. Early diagnosis is the key to ...prevent the deterioration of health of the patient to severe illness. Laboratory diagnosis of dengue is essential for providing appropriate supportive treatment to dengue patients with febrile illness, which is difficult to diagnose clinically. Here, we demonstrate surface enhanced Raman scattering (SERS) based diagnosis of dengue virus in clinical blood samples collected from total of 102 subjects. All of the samples were well characterized by conventional NS1 antigen and IgM antibody ELISA kits. The silver nanorods array fabricated by glancing angle deposition technique were employed as SERS substrates. A small amount of patient blood serum (5 μL) was taken for analysis and the report was prepared within a minute. SERS spectra of pure NS1 protein as well as spiked in serum was also recorded separately. Principal component analysis (PCA) was employed as the statistical tool to differentiate dengue positive, dengue negative, and healthy subjects on the basis of their respective SERS spectra. This method provides a sensitive, rapid, and field deployable diagnosis of dengue at the early stage (within 5 days of the onset of symptoms).
Foxtail millet (Setaria italica), the second largest cultivated millet crop after pearl millet, is utilized for food and forage globally. Further, it is also considered as a model crop for studying ...agronomic, nutritional and biofuel traits. In the present study, a genome-wide association study (GWAS) was performed for ten important agronomic traits in 142 foxtail millet core eco-geographically diverse genotypes using 10 K SNPs developed through GBS-ddRAD approach. Number of SNPs on individual chromosome ranged from 844 (chromosome 5) to 2153 (chromosome 8) with an average SNP frequency of 25.9 per Mb. The pairwise linkage disequilibrium (LD) estimated using the squared-allele frequency correlations was found to decay rapidly with the genetic distance of 177 Kb. However, for individual chromosome, LD decay distance ranged from 76 Kb (chromosome 6) to 357 Kb (chromosome 4). GWAS identified 81 MTAs (marker-trait associations) for ten traits across the genome. High confidence MTAs for three important agronomic traits including FLW (flag leaf width), GY (grain yield) and TGW (thousand-grain weight) were identified. Significant pyramiding effect of identified MTAs further supplemented its importance in breeding programs. Desirable alleles and superior genotypes identified in the present study may prove valuable for foxtail millet improvement through marker-assisted selection.
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