scholarly journals Jet-associated deuteron production in pp collisions at s=13 TeV

2021 ◽  
pp. 136440
Author(s):  
S. Acharya ◽  
D. Adamová ◽  
A. Adler ◽  
J. Adolfsson ◽  
G. Aglieri Rinella ◽  
...  
Keyword(s):  
Pp Collisions ◽  
Deuteron Production

scholarly journals (Anti-)deuteron production in pp collisions at $$\sqrt{s}=13 \ \text {TeV}$$

2020 ◽  
Vol 80 (9) ◽  
Author(s):  
S. Acharya ◽  
◽  
D. Adamová ◽  
A. Adler ◽  
J. Adolfsson ◽  
...  
Keyword(s):  
Charged Particle ◽  
Formation Mechanism ◽  
Bound States ◽  
High Energy ◽  
Light Nuclei ◽  
Particle Multiplicity ◽  
Charged Particle Multiplicity ◽  
Pp Collisions ◽  
Alice Experiment ◽  
Deuteron Production

AbstractThe study of (anti-)deuteron production in pp collisions has proven to be a powerful tool to investigate the formation mechanism of loosely bound states in high-energy hadronic collisions. In this paper the production of $$\text {(anti-)deuterons}$$ (anti-)deuterons is studied as a function of the charged particle multiplicity in inelastic pp collisions at $$\sqrt{s}=13$$ s = 13 TeV using the ALICE experiment. Thanks to the large number of accumulated minimum bias events, it has been possible to measure (anti-)deuteron production in pp collisions up to the same charged particle multiplicity ($${\mathrm {d} N_{ch}/\mathrm {d} \eta } \sim 26$$ d N ch / d η ∼ 26 ) as measured in p–Pb collisions at similar centre-of-mass energies. Within the uncertainties, the deuteron yield in pp collisions resembles the one in p–Pb interactions, suggesting a common formation mechanism behind the production of light nuclei in hadronic interactions. In this context the measurements are compared with the expectations of coalescence and statistical hadronisation models (SHM).

scholarly journals Multiplicity dependence of (anti-)deuteron production in pp collisions at s=7TeV

2019 ◽  
Vol 794 ◽  
pp. 50-63 ◽  
Author(s):  
S. Acharya ◽  
F.T. Acosta ◽  
D. Adamová ◽  
S.P. Adhya ◽  
A. Adler ◽  
...  
Keyword(s):  
Pp Collisions ◽  
Deuteron Production

scholarly journals The nature of X(3872) from high-multiplicity pp collisions

2021 ◽  
Vol 81 (7) ◽  
Author(s):  
Angelo Esposito ◽  
Elena G. Ferreiro ◽  
Alessandro Pilloni ◽  
Antonio D. Polosa ◽  
Carlos A. Salgado
Keyword(s):  
Quark Model ◽  
Relative Abundance ◽  
Interaction Model ◽  
High Multiplicity ◽  
Pp Collisions ◽  
Coalescence Model ◽  
Scientific Debate ◽  
Large Size ◽  
Deuteron Production

AbstractThe structure of exotic resonances that do not trivially fit the usual quark model expectations has been a matter of intense scientific debate during the last two decades. A possible way of estimating the size of these states is to study their behavior when immersed in QCD matter. Recently, LHCb has measured the relative abundance of the exotic $$X(3872)$$ X ( 3872 ) over the ordinary $$\psi (2S)$$ ψ ( 2 S ) . We use the comover interaction model to study the yield of a compact $$X(3872)$$ X ( 3872 ) . To confirm the reliability of the model in high-multiplicity pp collisions, we describe the suppression of excited over ground $$\Upsilon $$ Υ states. With this at hand, we show that the size of the compact $$X(3872)$$ X ( 3872 ) would be slightly larger than that of the $$\psi (2S)$$ ψ ( 2 S ) . If the $$X(3872)$$ X ( 3872 ) is instead assumed to be a meson molecule of large size, we argue that its evolution in QCD matter should be described via a coalescence model, as suggested by data on deuteron production. We show that the predictions of this model for the $$X(3872)$$ X ( 3872 ) are in contrast with data.

scholarly journals Studies on the anomalous magnetic and electric dipole moments of the tau-neutrino in pp collisions at the LHC

2019 ◽  
Vol 55 (8) ◽  
Author(s):  
A. Gutiérrez-Rodríguez ◽  
M. Köksal ◽  
A. A. Billur ◽  
M. A. Hernández-Ruíz
Keyword(s):  
Electric Dipole ◽  
Dipole Moments ◽  
Pp Collisions ◽  
Electric Dipole Moments ◽  
Tau Neutrino

scholarly journals Search for Higgs boson decays into two new low-mass spin-0 particles in the 4b channel with the ATLAS detector using pp collisions at s=13  TeV

2020 ◽  
Vol 102 (11) ◽  
Author(s):  
G. Aad ◽  
B. Abbott ◽  
D. C. Abbott ◽  
A. Abed Abud ◽  
K. Abeling ◽  
...  
Keyword(s):  
Higgs Boson ◽  
Atlas Detector ◽  
Pp Collisions ◽  
Low Mass

scholarly journals Measurements of the differential cross sections of the production of Z + jets and γ + jets and of Z boson emission collinear with a jet in pp collisions at $$ \sqrt{s} $$ = 13 TeV

2021 ◽  
Vol 2021 (5) ◽  
Author(s):  
◽  
A. M. Sirunyan ◽  
A. Tumasyan ◽  
W. Adam ◽  
F. Ambrogi ◽  
...  
Keyword(s):  
Cross Sections ◽  
Differential Cross ◽  
Z Boson ◽  
Center Of Mass ◽  
Z Bosons ◽  
Differential Cross Sections ◽  
Pp Collisions ◽  
Center Of Mass Energy ◽  
Cms Experiment ◽  
Theoretical Predictions

Abstract Measurements of the differential cross sections of Z + jets and γ + jets production, and their ratio, are presented as a function of the boson transverse momentum. Measurements are also presented of the angular distribution between the Z boson and the closest jet. The analysis is based on pp collisions at a center-of-mass energy of 13 TeV corresponding to an integrated luminosity of 35.9 fb−1 recorded by the CMS experiment at the LHC. The results, corrected for detector effects, are compared with various theoretical predictions. In general, the predictions at higher orders in perturbation theory show better agreement with the measurements. This work provides the first measurement of the ratio of the differential cross sections of Z + jets and γ + jets production at 13 TeV, as well as the first direct measurement of Z bosons emitted collinearly with a jet.

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