Measurements of the characteristic length scale  $$r_s$$  <math> <msub> <mi>r</mi> <mi>s</mi> </msub> </math>   of the baryon acoustic oscillations (BAO) provide a robust determination of the distance-redshift relation. Currently, the best (sub-per cent) estimate of  $$r_s$$  <math> <msub> <mi>r</mi> <mi>s</mi> </msub> </math>   at the drag epoch is provided by Cosmic Microwave Background (CMB) observations assuming the validity of the standard  $$\Lambda $$  <math> <mi>Λ</mi> </math>  CDM model at  $$z \sim 1000$$  <math> <mrow> <mi>z</mi> <mo>∼</mo> <mn>1000</mn> </mrow> </math>  . Therefore, inferring  $$r_s$$  <math> <msub> <mi>r</mi> <mi>s</mi> </msub> </math>   from low-z observations in a model-independent way and comparing its value with CMB estimates provides a consistency test of the standard cosmology and its assumptions at high-z. In this paper, we address this question and estimate the absolute BAO scale combining angular BAO measurements and type Ia Supernovae data. Our analysis uses two different methods to connect these data sets and finds a good agreement between the low-z estimates of  $$r_{s}$$  <math> <msub> <mi>r</mi> <mi>s</mi> </msub> </math>   with the CMB sound horizon at drag epoch, regardless of the value of the Hubble constant  $$H_0$$  <math> <msub> <mi>H</mi> <mn>0</mn> </msub> </math>   considered. These results highlight the robustness of the standard cosmology at the same time that they also reinforce the need for more precise cosmological observations at low-z.

Brazil

Thais Lemos

Italy

 Ruchika

Joel Carvalho

Jailson Alcaniz

Low-redshift estimates of the absolute scale of baryon acoustic oscillations

The strange behaviour of the universe’s dark sector offers us the flexibility to address cosmological problems with different approaches. Using this flexibility, we consider a possible exchange of energy among the dark sector components as a viable candidate model. In the present work, we investigate the interaction between two scalar fields within the generalization of a two-component chiral cosmology. We also show that there exists a unique equivalence between fields and fluids description of interacting dark sector model. Later, a detailed analysis of the dynamics of the dark energy-dark matter model with coupling in both kinetic and potential parts has been performed using a method of qualitative analysis of dynamical systems. Moreover, the cosmological viability of this model is analyzed for the potential of an exponential form via the phase-space study of autonomous system for various cosmological parameters.

India

Trupti Patil

Sukanta Panda

Thailand

Manabendra Sharma

Dynamics of interacting scalar field model in the realm of chiral cosmology

The prompt and non-prompt production cross-sections for ψ (2S) mesons are measured using 2.1 fb −1 of pp collision data at a centre-of-mass energy of 7 TeV recorded by the ATLAS experiment at the LHC. The measurement exploits the ψ (2S) → J/ψ (→ μ + μ − ) π + π − decay mode, and probes ψ (2S) mesons with transverse momenta in the range 10 ≤ p T &lt; 100 GeV and rapidity | y | &lt; 2 . 0. The results are compared to other measurements of ψ (2S) production at the LHC and to various theoretical models for prompt and non-prompt quarkonium production.

France

Georges Aad

United States

Brad Abbott

China

Jalal Abdallah

Samah Abdel Khalek

Azerbaijan

Ovsat Abdinov

Netherlands

Rosemarie Aben

Babak Abi

Maris Abolins

Canada

Ossama AbouZeid

Israel

Halina Abramowicz

Henso Abreu

CERN

Ricardo Abreu

Sweden

Yiming Abulaiti

United Kingdom

Bobby Samir Acharya

Poland

Leszek Adamczyk

David Adams

Jahred Adelman

Germany

Stefanie Adomeit

Tim Adye

Montenegro

Tatjana Agatonovic-Jovin

Spain

Juan Antonio Aguilar-Saavedra

Switzerland

Marco Agustoni

Steven Ahlen

Faig Ahmadov

Giulio Aielli

Henrik Akerstedt

Torsten Paul Ake Åkesson

Japan

Ginga Akimoto

Russia

Andrei Akimov

Gian Luigi Alberghi

Justin Albert

Solveig Albrand

Argentina

Maria Josefina Alconada Verzini

Martin Aleksa

Igor Aleksandrov

Romania

Calin Alexa

Gideon Alexander

Gauthier Alexandre

Greece

Theodoros Alexopoulos

Muhammad Alhroob

Gianluca Alimonti

Lion Alio

John Alison

Benedict Allbrooke

Lee John Allison

Phillip Allport

John Almond

Alberto Aloisio

Denmark

Alejandro Alonso

Francisco Alonso

Cristiano Alpigiani

Andrew David Altheimer

Barbara Alvarez Gonzalez

Mariagrazia Alviggi

Katsuya Amako

Yara Amaral Coutinho

Christoph Amelung

Dante Amidei

Portugal

Susana Patricia Amor Dos Santos

Antonio Amorim

Simone Amoroso

Nir Amram

Glenn Amundsen

Christos Anastopoulos

Lucian Stefan Ancu

Nansi Andari

Timothy Andeen

Christoph Falk Anders

Gabriel Anders

Kelby Anderson

Attilio Andreazza

George Victor Andrei

Xabier Anduaga

Stylianos Angelidakis

Ivan Angelozzi

Philipp Anger

Aaron Angerami

Francis Anghinolfi

Alexey Anisenkov

Nuno Anjos

Alberto Annovi

Ariadni Antonaki

Mario Antonelli

Alexey Antonov

Slovakia

Jaroslav Antos

Fabio Anulli

Masato Aoki

Ludovica Aperio Bella

Rudi Apolle

Giorgi Arabidze

Ignacio Aracena

Yasuo Arai

Juan Pedro Araque

Ayana Arce

Jean-Francois Arguin

Spyridon Argyropoulos

Türkiye

Metin Arik

Aaron James Armbruster

Olivier Arnaez

Vanessa Arnal

Measurement of the production cross-section of ψ (2S) → J/ψ (→ μ + μ − ) π + π − in pp collisions at s $$ \sqrt{s} $$ = 7 TeV at ATLAS