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Innovative Study Unveils New Insights into Asymmetric Particle Collisions

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credit: Nuclear Science and Techniques
Centrality dependence of model parameters y0a, y0A, σa and σA in p+Al, p+Au and 3He+Au collision at √sNN= GeV. The lines are the linear fit results to guide the eyes.
« Innovative Study Unveils New Insights into Asymmetric Particle Collisions

Newswise — A study is published in the journal of Nuclear Science and Techniques, researchers led by Prof. Hua Zheng from Shaanxi Normal University, heralding a significant breakthrough in high-energy particle physics. This study sheds new light on the behavior of particles in high-energy collisions, an area of research integral to deepening our understanding of the universe’s origins.

In this comprehensive study, the researchers implemented the Tsallis thermodynamics framework, utilizing the Tsallis distribution—a sophisticated extension of the Boltzmann-Gibbs distribution—to analyze the transverse momentum spectrum of particles in high-energy collisions. This innovative method considers particles detected in experiments as being produced by fireballs, which adhere to the Tsallis distribution, thereby providing a more detailed and nuanced understanding of particle dynamics in high-energy collision environments. Focusing on asymmetric collision systems, specifically p+Al, p+Au, and 3He+Au at 200 GeV, the team leveraged the fireball model rooted in Tsallis thermodynamics. This model proved effective in fitting the experimental data from these complex collision systems. A key aspect of the study was examining the total multiplicities of charged particles, particularly their relationship with the centrality of the collisions. The research also highlighted the significant impact of data quality, especially in terms of pseudo-rapidity distributions, on the overall findings. Further, the study delved deeply into the variations in fireball model parameters, analyzing how these parameters change with both the centrality and the size of the collision systems. This approach uncovered the intricate and complex dynamics characteristic of asymmetric collisions, contributing significantly to the field of high-energy particle physics.

This study’s findings confirm that the fireball model with Tsallis thermodynamics can be a universal framework to describe the pseudo-rapidity distribution of charged particles produced in asymmetric collision systems. The success of this model in fitting experimental data paves the way for more detailed studies into the complex dynamics of high-energy particle collisions. These insights are not only significant for theoretical physics but also have practical implications in particle accelerator experiments and the search for new elements and particles physics. The continued exploration of these complex systems will deepen our understanding of the universe’s fundamental processes.

References

DOI

10.1007/s41365-023-01334-9

Original Source URL

https://doi.org/10.1007/s41365-023-01334-9

Funding information

The National Natural Science Foundation of China (11905120, 11947416);
The Natural Science Foundation of Sichuan Province (2023NSFSC1322);
The Natural Science Basic Research Plan in Shaanxi Province of China (2023-JC-YB-012);
The United States Department of Energy (DE-FG02-93ER40773);
The NNSA (DENA0003841 (CENTAUR)).

About Nuclear Science and Techniques

Nuclear Science and Techniques (NST) reports scientific findings, technical advances and important results in the fields of nuclear science and techniques. The aim of this periodical is to stimulate cross-fertilization of knowledge among scientists and engineers working in the fields of nuclear research.

Journal Link: Nuclear Science and Techniques

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Unlocking the Next Frontier: Odysseus Lunar Lander’s Historic Mission

“Odysseus lunar lander aims to make history with first U.S. spacecraft touchdown on moon in 50 years. A testament to human ambition and innovation.”

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In the vast expanse of space, where dreams of exploration meet the harsh realities of technology and finance, Thursday marks a potential landmark moment in the annals of space exploration. The Odysseus lunar lander, a testament to human ingenuity and perseverance, stands on the precipice of making history as it aims to achieve what no U.S.-made spacecraft has done in five decades: a controlled touchdown on the lunar surface.

Intuitive Machines-1 Lunar Landing (Official NASA Broadcast)

After a breathtaking lift-off from Florida, Odysseus embarked on its journey towards the moon, capturing awe-inspiring images of our planet Earth along the way. Now, as it hurtles closer to its destination, the anticipation mounts for what could be the most perilous test yet – a soft landing on the moon’s surface.

Intuitive Machines, the pioneering force behind Odysseus, dares to tread where no private company has ventured before. If successful, this endeavor would mark the resurgence of American-made spacecraft landing on the moon since the final Apollo mission in 1972.

However, the road to lunar exploration is fraught with challenges, both technical and financial. While the Apollo program once commanded a budget exceeding 4% of all U.S. government spending, today’s NASA operates on a fraction of that, a mere 0.4%. To stretch resources further, NASA has turned to outsourcing robotic lunar landings to commercial entities like Intuitive Machines, aiming to achieve ambitious goals like the Artemis program’s lunar return with reduced costs.

But cost isn’t the only hurdle. The technical feat of landing a spacecraft precisely on a celestial body a quarter of a million miles away is akin to hitting a golf ball from New York to Los Angeles and landing it in a specific hole – a daunting task even with today’s advanced technology. Compounding the challenge is the time delay of roughly three seconds for signals to travel between Earth and the moon, leaving little room for error during critical maneuvers.

Moreover, the legacy of Apollo-era expertise has waned over the decades, leaving a gap that new technology alone cannot bridge. As Dr. Scott Pace of George Washington University’s Space Policy Institute aptly notes, “These are people doing it for the first time, and there’s no substitute for that experience.”

Yet, amidst these challenges, there’s an undeniable sense of optimism and determination. As Lisa Altemus of Intuitive Machines emphasizes, success in lunar exploration requires collective resilience, collaboration, and a willingness to learn from failures. It heralds not just a scientific achievement but the dawn of a new era – an emerging lunar economy where the moon’s resources could unlock boundless opportunities for humanity.

If Odysseus achieves its mission, it will not only mark the first U.S. spacecraft landing on the moon in half a century but also pave the way for future lunar endeavors, including the exploration of the moon’s south pole, a region rich in potential resources like ice and water.

As we stand on the brink of this historic moment, let us marvel at the audacity of human ambition, the tenacity of scientific endeavor, and the boundless possibilities that lie beyond Earth’s confines. The journey to the moon may be fraught with challenges, but with each step, we inch closer to unlocking the mysteries of our celestial neighbor and forging a new chapter in the saga of space exploration.

https://www.azfamily.com/app/2024/02/22/us-company-attempts-first-moon-landing-thursday-since-1972/

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NASA Astronaut Available for Interviews Prior to Space Station Mission

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NASA astronaut Tracy Dyson poses for a portrait at NASA’s Johnson Space Center in Houston.
Credits: NASA

NASA astronaut Tracy C. Dyson is available in limited opportunities to discuss her mission beginning at 8 a.m. EST on Monday, Feb. 26. The interviews will take place ahead of Dyson launching to the International Space Station in March.

The virtual interviews will stream live on NASA+, NASA Television, and the agency’s website. Learn how to stream NASA TV through a variety of platforms including social media.

Interested media must submit a request to speak with Dyson no later than 12 p.m. Friday, Feb. 23, to the NASA Johnson Space Center in Houston newsroom at 281-483-5111 or jsccommu@mail.nasa.gov.

Dyson is scheduled to launch aboard the Soyuz MS-25 spacecraft Thursday, March 21, and will spend approximately six months aboard the space station. She will travel to the station with Roscosmos cosmonaut Oleg Novitskiy and spaceflight participant Marina Vasilevskaya of Belarus, both of whom will spend approximately 12 days aboard the orbital complex.

During her expedition, Dyson will conduct scientific investigations and technology demonstrations that help prepare humans for future space missions and benefit people on Earth. Among some of the hundreds of experiments ongoing during her mission, Dyson will continue to study how fire spreads and behaves in space with the Combustion Integrated Rack, as well as contribute to the long-running Crew Earth Observations study by photographing Earth to better understand how our planet is changing over time.

After completing her expedition, Dyson will return to Earth this fall with Roscosmos cosmonauts Oleg Kononenko and Nikolai Chub on the Soyuz MS-25 spacecraft.

Learn more about International Space Station research and operations at:

https://www.nasa.gov/station

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New NASA Mission will Study Ultraviolet Sky, Stars, Stellar Explosions

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WASHINGTON /PRNewswire/ — As NASA explores the unknown in air and space, a new mission to survey ultraviolet light across the entire sky will provide the agency with more insight into how galaxies and stars evolve. The space telescope, called UVEX (UltraViolet EXplorer), is targeted to launch in 2030 as NASA’s next Astrophysics Medium-Class Explorer mission.

This image shows the heart of the barred spiral galaxy NGC 1097, as seen by NASA’s Hubble Space Telescope. Credit: ESA/Hubble & NASA, D. Sand, K. Sheth

In addition to conducting a highly sensitive all-sky survey, UVEX will be able to quickly point toward sources of ultraviolet light in the universe. This will enable it to capture the explosions that follow bursts of gravitational waves caused by merging neutron stars. The telescope also will carry an ultraviolet spectrograph to study stellar explosions and massive stars.

“NASA’s UVEX will help us better understand the nature of both nearby and distant galaxies, as well as follow up on dynamic events in our changing universe,” said Nicola Fox, associate administrator, Science Mission Directorate at NASA Headquarters in Washington. “This mission will bring key capabilities in near-and far-ultraviolet light to our fleet of space telescopes, delivering a wealth of survey data that will open new avenues in exploring the secrets of the cosmos.”

The telescope’s ultraviolet survey will complement data from other missions conducting wide surveys in this decade, including the Euclid mission led by ESA (European Space Agency) with NASA contributions, and NASA’s Nancy Grace Roman Space Telescope, set to launch by May 2027. Together, these missions will help create a modern, multi-wavelength map of our universe.

“With the innovative new UVEX mission joining our portfolio, we will gain an important legacy archive of data that will be of lasting value to the science community,” said Mark Clampin, director of the Astrophysics Division at NASA Headquarters. “This new telescope will contribute to our understanding of the universe across multiple wavelengths and address one of the major priorities in Astrophysics today: studying fleeting changes in the cosmos.”

NASA selected the UVEX Medium-Class Explorer concept to continue into development after detailed review of two Medium-Class Explorer and two Mission of Opportunity concept proposals by a panel of scientists and engineers, and after evaluation based on NASA’s current astrophysics portfolio coupled with available resources. The UVEX mission was selected for a two-year mission and will cost approximately $300 million, not including launch costs.

The mission’s principal investigator is Fiona Harrison at Caltech in Pasadena, California. Other institutions involved in the mission include University of California at Berkeley, Northrop Grumman, and Space Dynamics Laboratory.

The Explorers Program is the oldest continuous NASA program. The program is designed to provide frequent, low-cost access to space using principal investigator-led space science investigations relevant to the agency’s astrophysics and heliophysics programs.

Since the launch of Explorer 1 in 1958, which discovered the Earth’s radiation belts, the Explorers Program has launched more than 90 missions, including the Uhuru and Cosmic Background Explorer missions that led to Nobel prizes for their investigators.

The program is managed by NASA’s Goddard Space Flight Center for the Science Mission Directorate, which conducts a wide variety of research and scientific exploration programs for Earth studies, space weather, the solar system, and the universe.

For more information about the Explorers Program, visit:

https://explorers.gsfc.nasa.gov

SOURCE NASA

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