Hadronic resonances are strongly decaying particles with extremely short lifetimes of about few fm/c, which are comparable to or smaller than the lifetime of the system formed in relativistic ...collisions. Due to their short lifetimes, resonance particles can be used to investigate the freeze-out mechanisms after hadronization. This contribution summarizes the results of resonance particle productions measured by the ALICE collaboration at LHC from various colliding systems and energies. Measured mass, width, transverse momentum and particle ratios of those resonances have been reported. Theoretical predictions from thermal model calculations are also presented.
A successful description of the particle ratios measured in heavy-ion collisions has been achieved in the framework of thermal models. In such a way, a large number of observables can be reproduced ...with a small number of parameters, namely the temperature, baryo-chemical potential and a factor measuring the degree of strangeness saturation. The comparison of experimental data at and the model estimations has made possible to define the thermodynamic parameters of strongly interacting matter at chemical freeze-out temperature. The detailed study of hadron and meson production including resonances using the statistical-thermal model is discussed. Their ratios are compared with the existing experimental data and predictions are made for pp and heavy-ion collisions at RHIC and LHC energies.
The inclusive production cross sections at forward rapidity of
J
/
ψ
,
ψ
(
2
S
)
,
Υ
(1S) and
Υ
(2S) are measured in
pp
collisions at
s
=
7
TeV
with the ALICE detector at the LHC. The analysis is ...based on a data sample corresponding to an integrated luminosity of 1.35 pb
-
1
. Quarkonia are reconstructed in the dimuon-decay channel and the signal yields are evaluated by fitting the
μ
+
μ
-
invariant mass distributions. The differential production cross sections are measured as a function of the transverse momentum
p
T
and rapidity
y
, over the ranges
0
<
p
T
<
20
GeV/c for
J
/
ψ
,
0
<
p
T
<
12
GeV/c for all other resonances and for
2.5
<
y
<
4
. The measured cross sections integrated over
p
T
and
y
, and assuming unpolarized quarkonia, are:
σ
J
/
ψ
=
6.69
±
0.04
±
0.63
μ
b,
σ
ψ
(
2
S
)
=
1.13
±
0.07
±
0.19
μ
b,
σ
Υ
(
1
S
)
=
54.2
±
5.0
±
6.7
nb and
σ
Υ
(
2
S
)
=
18.4
±
3.7
±
2.9
nb, where the first uncertainty is statistical and the second one is systematic. The results are compared to measurements performed by other LHC experiments and to theoretical models.
The yield of charged particles associated with high-p{sub t} trigger particles (8 < p{sub t} < 15 GeV/c) is measured with the ALICE detector in Pb-Pb collisions at {radical}s{sub NN} = 2.76 TeV ...relative to proton-proton collisions at the same energy. The conditional per-trigger yields are extracted from the narrow jetlike correlation peaks in azimuthal dihadron correlations. In the 5% most central collisions, we observe that the yield of associated charged particles with transverse momenta p{sub t} > 3 GeV/c on the away side drops to about 60% of that observed in pp collisions, while on the near side a moderate enhancement of 20%-30% is found.
Aim: To assess the risk factors associated with high rate of insufficient endometrial sampling on endometrial biopsy in postmenopausal women.
Methods: Data were retrieved from the records of 522 ...consecutive patients who underwent endometrial sampling. Logistic regression analyses were performed to determine various factors associated with scanty endometrial biopsy. The exclusion criteria included patient refusal, uncertain menopausal status, cervical carcinoma detected after sampling and unavailable records.
Results: The sample was insufficient for a definitive diagnosis in 143 (25.9%) patients. Out of these, 53 cases were investigated with invasive procedures. Further histopathological examination revealed that five (9.4%) patients had uterine malignancy. Based on the multivariate analysis, time since the onset of menopause Odds ratio (OR)=1.044, 95% confidence interval (CI)=1.000-1.090, p=0.049 was significantly associated with insufficient endometrial biopsy in cases with a endometrial thickness of >12 mm on ultrasonography (OR=0.624, 95% CI=0.472-0.824, p=0.001). The use of dilation and curettage technique (OR=0.662, 95% CI=0.522-0.841, p=0.001) decreased the risk of insufficient sampling on endometrial biopsy.
Conclusion: Time since the onset of menopause and the thickness of endometrium were significant independent factors associated with insufficient sample. Using Karman cannula for endometrial aspiration may not be a reliable method in the evaluation of postmenopausal women. An insufficient endometrial sample does not rule out endometrial carcinoma, therefore, a further histopathological examination is recommended.
The study of short-lived resonances allows the investigation of the collision dynamics and of the properties of the hot and dense medium created in high energy collisions. Moreover it is interesting ...to address the topics of the strangeness production by the analysis of strange resonances. First measurements of the φ(1020), Λ *(1520), K*(892), Ξ *(1530) and doubly charged Δ(1232) resonances in pp collisions at a center of mass energy of 7 TeV with the ALICE apparatus at the LHC are presented. Thermal model predictions of particle ratios in proton-proton collisions are shown.
Background and AimHepatocellular carcinoma (HCC) is one of the most common and most lethal cancers worldwide. The objective of this study was to investigate the relationship between basal parameters ...and survival characteristics in patients with HCC. Materials and MethodsThe records of 1447 HCC patients of a tertiary center during the period 2000-2017 were screened retrospectively. The demographic details; basal clinical, laboratory, and radiological characteristics; treatments; and survival time were recorded and prognostic scores were calculated. ResultsA total of 788 patients with HCC (male/female: 623/165; mean age: 60.5±10.9 years) were included in the study. The median length of survival was 26.3 months (95% confidence interval CI, 22.3-30.4 months). The 5-year survival rate was 28.1%. The number and diameter of the tumors; platelet count; platelet-to-lymphocyte ratio; level of aspartate aminotransferase, alanine aminotransferase, and gamma-glutamyl transferase; portal and hepatic vein involvement; and an alpha-fetoprotein level of <9.6 ng/mL were found to be independently related to survival. ConclusionThe positive predictive value of the prognostic index derived from independent survival-related parameters for 5- and 10-year survival or overall survival was approximately 86%. Integration of this prognostic index to the criteria used in making treatment decisions for patients with HCC should be considered.
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