15 research outputs found
The cosmic ultraviolet baryon survey (CUBS): IV: The complex multiphase circumgalactic medium as revealed by partial Lyman limit systems
Galaxie
The cosmic ultraviolet baryon survey (CUBS): II. Discovery of an H-bearing DLA in the vicinity of an early-type galaxy at z = 0.576
Interstellar matter and star formatio
Benefits and Risks of Reverse Inclusion for Preschoolers With and Without Disabilities: Parents' Perspectives
LitR, a new transcriptional activator in Vibrio fischeri, regulates luminescence and symbiotic light organ colonization
Using Human Service Center Interfaces and their Information to Foster Innovation Management
The impact of intrinsic charm on the parton distribution functions
In this work, we present a new investigation about the impact of intrinsic
charm (IC) on the physical observables, in particular, on the heavy structure
function . Since IC distribution is dominant at large Bjorken variable
, normally, it is expected that it can be explored only at large . But,
by studying the correlation of the charm density in the proton with , we
are going to show that the IC component can also be effective at low . To
investigate further, we perform three QCD global analyses of parton
distribution functions (PDFs), by including the EMC data that are
recognized as clear evidence for existence of the intrinsic charm in the
proton, and also by considering the IC component. Although the fit of the EMC
data is extremely poor due to the data points with lower values, i.e. 0.05, but these analyses can give us new information about the impact of EMC
data and IC contribution on the behaviour of PDFs.Comment: I withdraw this paper since my supervisor require me to withdraw this
pape
The Present and Future of QCD
International audienceThis White Paper presents the community inputs and scientific conclusions from the Hot and Cold QCD Town Meeting that took place September 23-25, 2022 at MIT, as part of the Nuclear Science Advisory Committee (NSAC) 2023 Long Range Planning process. A total of 424 physicists registered for the meeting. The meeting highlighted progress in Quantum Chromodynamics (QCD) nuclear physics since the 2015 LRP (LRP15) and identified key questions and plausible paths to obtaining answers to those questions, defining priorities for our research over the coming decade. In defining the priority of outstanding physics opportunities for the future, both prospects for the short (~ 5 years) and longer term (5-10 years and beyond) are identified together with the facilities, personnel and other resources needed to maximize the discovery potential and maintain United States leadership in QCD physics worldwide. This White Paper is organized as follows: In the Executive Summary, we detail the Recommendations and Initiatives that were presented and discussed at the Town Meeting, and their supporting rationales. Section 2 highlights major progress and accomplishments of the past seven years. It is followed, in Section 3, by an overview of the physics opportunities for the immediate future, and in relation with the next QCD frontier: the EIC. Section 4 provides an overview of the physics motivations and goals associated with the EIC. Section 5 is devoted to the workforce development and support of diversity, equity and inclusion. This is followed by a dedicated section on computing in Section 6. Section 7 describes the national need for nuclear data science and the relevance to QCD research
The present and future of QCD
International audienceThis White Paper presents an overview of the current status and future perspective of QCD research, based on the community inputs and scientific conclusions from the 2022 Hot and Cold QCD Town Meeting. We present the progress made in the last decade toward a deep understanding of both the fundamental structure of the sub-atomic matter of nucleon and nucleus in cold QCD, and the hot QCD matter in heavy ion collisions. We identify key questions of QCD research and plausible paths to obtaining answers to those questions in the near future, hence defining priorities of our research over the coming decades