Unisa BioMed Central: Recent submissions

Now showing items 21-40 of 197

Underlying-event studies with strange hadrons in pp collisions at s = 13 TeV with the ATLAS detector

(2024-12-29)

Abstract Properties of the underlying-event in pp interactions are investigated primarily via the strange hadrons K S 0 , Λ and Λ ¯ , as reconstructed using the ATLAS detector at the LHC in minimum-bias pp collision data ...
Operation and performance of the ATLAS tile calorimeter in LHC Run 2

(2024-12-24)

Abstract The ATLAS tile calorimeter (TileCal) is the hadronic sampling calorimeter covering the central region of the ATLAS detector at the Large Hadron Collider (LHC). This paper gives an overview of the calorimeter’s ...
Measurement of the W-boson mass and width with the ATLAS detector using proton–proton collisions at s = 7 TeV

(2024-12-21)

Abstract Proton–proton collision data recorded by the ATLAS detector in 2011, at a centre-of-mass energy of 7 TeV, have been used for an improved determination of the W-boson mass and a first measurement of the W-boson ...
The COVID-19 restrictions, child services and the well-being of children in South Africa

Marais, Lochner; Matamanda, Abraham; Gbadegesin, Frances Ntema, John; Mgwele, Abongile; Dunn, Mischka; Nel, Verna; Lehobo, Timothy M.; Andres, Lauren et al. (2024-11-06)

Abstract Covid-19 posed little danger to children. Nevertheless, the South African government imposed lockdown measures that impeded children’s education, play and food. Schools were closed, feeding schemes were halted and ...
Search for new particles in events with a hadronically decaying W or Z boson and large missing transverse momentum at s = 13 TeV using the ATLAS detector

Aad, G.; Aakvaag, E.; Abbott, B. Abdelhameed, S.; Abeling, K.; Abicht, N. J.; Abidi, S. H.; Aboelela, M.; Aboulhorma, A. et al. (2024-11-22)

Abstract A search is presented for new particles produced in proton-proton collisions at a centre-of-mass energy of 13 TeV that result in final states comprising a massive vector (W or Z) boson that decays hadronically and ...
Observation of t t ¯ production in the lepton+jets and dilepton channels in p+Pb collisions at s NN = 8.16 TeV with the ATLAS detector

Aad, G.; Aakvaag, E.; Abbott, B. Abdelhameed, S.; Abeling, K.; Abicht, N. J.; Abidi, S. H.; Aboelela, M.; Aboulhorma, A. et al. (2024-11-19)

Abstract This paper reports the observation of top-quark pair production in proton-lead collisions in the ATLAS experiment at the Large Hadron Collider. The measurement is performed using 165 nb−1 of p+Pb data collected ...
Interpretations of the ATLAS measurements of Higgs boson production and decay rates and differential cross-sections in pp collisions at s = 13 TeV

Aad, G.; Abbott, B.; Abeling, K. Abicht, N. J.; Abidi, S. H.; Aboulhorma, A.; Abramowicz, H.; Abreu, H.; Abulaiti, Y. et al. (2024-11-15)

Abstract Measurements of the Higgs boson production times decay rates and differential cross-sections have recently been performed by the ATLAS experiment in several decay channels using up to 139 fb−1 of proton-proton ...
Search for a resonance decaying into a scalar particle and a Higgs boson in the final state with two bottom quarks and two photons in proton–proton collisions at s = 13 TeV with the ATLAS detector

Aad, G.; Aakvaag, E.; Abbott, B. Abeling, K.; Abicht, N. J.; Abidi, S. H.; Aboelela, M.; Aboulhorma, A.; Abramowicz, H. et al. (2024-11-07)

Abstract A search for the resonant production of a heavy scalar X decaying into a Higgs boson and a new lighter scalar S, through the process X → S(→ b b ¯ )H(→γγ), where the two photons are consistent with the Higgs boson ...
Search for neutral long-lived particles that decay into displaced jets in the ATLAS calorimeter in association with leptons or jets using pp collisions at s = 13 TeV

Aad, G.; Aakvaag, E.; Abbott, B. Abdelhameed, S.; Abeling, K.; Abicht, N. J.; Abidi, S. H.; Aboelela, M.; Aboulhorma, A. et al. (2024-11-06)

Abstract A search for neutral long-lived particles (LLPs) decaying in the ATLAS hadronic calorimeter using 140 fb−1 of proton-proton collisions at s = 13 TeV delivered by the LHC is presented. The analysis is composed of ...
Measurements of inclusive and differential cross-sections of t t ¯ γ production in pp collisions at s = 13 TeV with the ATLAS detector

Aad, G.; Aakvaag, E.; Abbott, B. Abeling, K.; Abicht, N. J.; Abidi, S. H.; Aboelela, M.; Aboulhorma, A.; Abramowicz, H. et al. (2024-10-25)

Abstract Inclusive and differential cross-sections are measured at particle level for the associated production of a top quark pair and a photon ( t t ¯ γ ). The analysis is performed using an integrated luminosity of 140 ...
Erratum: Exact rotating black hole solutions for f(R) gravity by modified Newman Janis algorithm

Chaturvedi, Pankaj; Kumar, Utkarsh; Thattarampilly, Udaykrishna; Kakkat, Vishnu (2024-11-15)
Precise measurements of W- and Z-boson transverse momentum spectra with the ATLAS detector using pp collisions at s = 5.02 TeV and 13 TeV

Aad, G.; Abbott, B.; Abeling, K. Abicht, N. J.; Abidi, S. H.; Aboulhorma, A.; Abramowicz, H.; Abreu, H.; Abulaiti, Y. et al. (2024-10-30)

Abstract This paper describes measurements of the transverse momentum spectra of W and Z bosons produced in proton–proton collisions at centre-of-mass energies of s = 5.02 TeV and s = 13 TeV with the ATLAS experiment at ...
The role of Teff crop in Ethiopian life: consumption and contribution to rural livelihoods

Gebrehiwot, Nahusenay T.; Ndinda, Catherine (2024-10-02)

Abstract Teff (Eragrostis tef) is believed to be the smallest grain in the world. It is the most important crop in Ethiopia in terms of production and consumption. Smallholder farmers produce Teff, and it is the main source ...
Estimation of the biaxial tensile behavior of ovine esophageal tissue using artificial neural networks

Ngwangwa, H. M.; Modungwa, D.; Pandelani, T.; Nemavhola, F. J. (2024-10-12)

Abstract Diseases of the esophagus affect its function and often lead to replacement of long sections of the organ. Current healing methods involve the use of bioscaffolds processed from other animal models. Although the ...
Occurrence and characterization of ESKAPE organisms on the hands of veterinary students before patient contact at a veterinary academic hospital, South Africa

Sebola, Dikeledi C.; Oguttu, James W.; Malahlela, Mogaugedi N.; Kock, Marleen M.; Qekwana, Daniel N. (2024-10-17)

Abstract Objective This study aimed to investigate the presence of ESKAPE organisms on the hands of students working in the intensive care unit (ICU) at a veterinary academic hospital. Methods A cross-sectional study was ...
Rubella epidemiology in Lesotho after vaccine introduction: a five-year review, 2018–2022

Makhupane, Thabelo; Habedi, DSK (2024-10-18)

Abstract Background The rubella virus is a major contributor to birth defects globally and is preventable by vaccination. In 2020, the world was supposed to be free of both rubella and Congenital Rubella Syndrome (CRS) ...
Search for heavy resonances in final states with four leptons and missing transverse momentum or jets in pp collisions at s = 13 TeV with the ATLAS detector

Aad, G.; Aakvaag, E.; Abbott, B. Abeling, K.; Abicht, N. J.; Abidi, S. H.; Aboulhorma, A.; Abramowicz, H.; Abreu, H. et al. (2024-10-17)

Abstract A search for a new heavy boson produced via gluon-fusion in the four-lepton channel with missing transverse momentum or jets is performed. The search uses proton-proton collision data equivalent to an integrated ...
Search for a resonance decaying into a scalar particle and a Higgs boson in final states with leptons and two photons in proton-proton collisions at s = 13 TeV with the ATLAS detector

Aad, G.; Aakvaag, E.; Abbott, B. Abdelhameed, S.; Abeling, K.; Abicht, N. J.; Abidi, S. H.; Aboelela, M.; Aboulhorma, A. et al. (2024-10-11)

Abstract A search for a hypothetical heavy scalar particle, X, decaying into a singlet scalar particle, S, and a Standard Model Higgs boson, H, using 140 fb−1 of proton-proton collision data at the centre-of-mass energy ...
Constraints on simplified dark matter models involving an s-channel mediator with the ATLAS detector in pp collisions at s = 13 TeV

Aad, G.; Aakvaag, E.; Abbott, B. Abdelhameed, S.; Abeling, K.; Abicht, N. J.; Abidi, S. H.; Aboelela, M.; Aboulhorma, A. et al. (2024-10-24)

Abstract This paper reports a summary of searches for a fermionic dark matter candidate in the context of theoretical models characterised by a mediator particle exchange in the s-channel. The data sample considered consists ...
Fiducial and differential cross-section measurements of electroweak W γ j j production in pp collisions at s = 13 TeV with the ATLAS detector

(2024-10-15)

Abstract The observation of the electroweak production of a W boson and a photon in association with two jets, using pp collision data at the Large Hadron Collider at a centre of mass energy of s = 13 TeV, is reported. ...

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