Publications by authors named "G Ordonez de Navarro"
High-energy nuclear collisions create a quark-gluon plasma, whose initial condition and subsequent expansion vary from event to event, impacting the distribution of the eventwise average transverse momentum [P([p_{T}])]. Disentangling the contributions from fluctuations in the nuclear overlap size (geometrical component) and other sources at a fixed size (intrinsic component) remains a challenge. This problem is addressed by measuring the mean, variance, and skewness of P([p_{T}]) in ^{208}Pb+^{208}Pb and ^{129}Xe+^{129}Xe collisions at sqrt[s_{NN}]=5.
View Article and Find Full Text PDFArticle Synopsis
- GPR88 is an orphan G protein-coupled receptor primarily found in the striatum, and its function is not well understood despite changes in its expression seen in Parkinson's disease models.
- GPR88 was found to interact with the kappa-opioid receptor (KOR), and this interaction inhibits KOR-mediated signaling, as evidenced by experiments showing that GPR88 can modulate effects of KOR agonists in both cultured cells and primary striatal neurons.
- The GPR88-KOR complexes were more common in specific neurons related to dopamine pathways, suggesting that understanding their relationship could have implications for conditions like neuropathic pain, Parkinson's disease, and neuropsychiatric disorders.
Article Synopsis
- - Calcium ion (Ca) homeostasis is essential for proper neuron function, and this study investigated how the CB receptor (CBR) interacts with the ATR receptor to regulate cytoplasmic Ca levels in CNS neurons.
- - A specific type of interaction called AT-CB receptor heteromers (ATCBHets) was identified using bioluminescence resonance energy transfer (BRET) in lab cells and in the context of Parkinson's disease (PD).
- - The study found that activation of ATR reduces Ca levels in the presence of cannabinoids, and in a rat model of PD, lower levels of ATCBHets were linked to lesioned neurons, suggesting that cannabinoids might help mitigate calcium imbalance related to levodopa-induced
A search for the exclusive hadronic decays W^{±}→π^{±}γ, W^{±}→K^{±}γ, and W^{±}→ρ^{±}γ is performed using up to 140 fb^{-1} of proton-proton collisions recorded with the ATLAS detector at a center-of-mass energy of sqrt[s]=13 TeV. If observed, these rare processes would provide a unique test bench for the quantum chromodynamics factorization formalism used to calculate cross sections at colliders. Additionally, at future colliders, these decays could offer a new way to measure the W boson mass through fully reconstructed decay products.
View Article and Find Full Text PDFArticle Synopsis
- - The ATLAS experiment at the LHC conducted a search for long-lived particles (LLPs) using a large dataset (140 fb^{-1}) from proton-proton collisions at 13 TeV, focusing on LLPs with masses from 5 to 55 GeV that decay within the inner detector.
- - The study considered scenarios where LLPs are produced from exotic Higgs boson decays and models involving axionlike particles (ALPs).
- - No significant findings above expected background levels were detected, leading to the establishment of upper limits on various production rates involving the Higgs boson and the top quark related to LLPs and ALPs.