기사 메일전송
[Daily Today] ATLAS and CMS release results of most comprehensive studies yet of Higgs boson’s properties
  • 기사등록 2022-07-05 22:23:46
  • 기사수정 2022-07-05 22:25:01
기사수정 (조회수:613건)   

The collaborations have used the largest samples of proton–proton collision data recorded so far by the experiments to study the unique particle in unprecedented detail



▲ photo: CREN


Today, exactly ten years after announcing the discovery of the Higgs boson, the international ATLAS and CMS collaborations at the Large Hadron Collider (LHC) report the results of their most comprehensive studies yet of the properties of this unique particle.


The independent studies, described in two papers published today in Nature, show that the particle’s properties are remarkably consistent with those of the Higgs boson predicted by the Standard Model of particle physics. The studies also show that the particle is increasingly becoming a powerful means to search for new, unknown phenomena that if found could help shed light on some of the biggest mysteries of physics, such as the nature of the mysterious dark matter present in the universe.


The Higgs boson is the particle manifestation of an all-pervading quantum field, known as the Higgs field, that is fundamental to describe the universe as we know it. Without this field, elementary particles such as the quark constituents of the protons and neutrons of atomic nuclei, as well as the electrons that surround the nuclei, would not have mass, and nor would the heavy particles (W bosons) that carry the charged weak force, which initiates the nuclear reaction that powers the Sun.


To explore the full potential of the LHC data for the study of the Higgs boson, including its interactions with other particles, ATLAS and CMS combine numerous complementary processes in which the Higgs boson is produced and “decays” into other particles.


This is what the collaborations have done in their new, independent studies, using their full LHC Run 2 data sets, which each include over 10 000 trillion protonproton collisions and about 8 million Higgs bosons 30 times more than at the time of the particle’s discovery. The new studies each combine an unprecedented number and variety of Higgs boson production and decay processes to obtain the most precise and detailed set of measurements to date of their rates, as well as of the strengths of the Higgs boson’s interactions with other particles.


All of the measurements are remarkably consistent with the Standard Model predictions within a range of uncertainties depending, among other criteria, on the abundance of a given process. For the Higgs boson’s interaction strength with the carriers of the weak force, an uncertainty of 6% is achieved. By way of comparison, similar analyses with the full Run 1 data sets resulted in a 15% uncertainty for that interaction strength.


“After just ten years of Higgs boson exploration at the LHC, the ATLAS and CMS experiments have provided a detailed map of its interactions with force carriers and matter particles,” says ATLAS spokesperson Andreas Hoecker. 


“The Higgs sector is directly connected with very profound questions related to the evolution of the early universe and its stability, as well as to the striking mass pattern of matter particles. The Higgs boson discovery has sparked an exciting, deep and broad experimental effort that will extend throughout the full LHC programme.”


“Sketching such a portrait of the Higgs boson this early on was unthinkable before the LHC started operating,” says CMS spokesperson Luca Malgeri. “The reasons for this achievement are manifold and include the exceptional performances of the LHC and of the ATLAS and CMS detectors, and the ingenious data analysis techniques employed.”


The new combination analyses also provide, among other new results, stringent bounds on the Higgs boson’s interaction with itself and also on new, unknown phenomena beyond the Standard Model, such as on Higgs boson decays into invisible particles that may make up dark matter.


ATLAS and CMS will continue revealing the nature of the Higgs boson using data from the LHC’s Run 3, which starts tomorrow at a new high-energy frontier, and from the collider’s major upgrade, the High-Luminosity LHC (HL-LHC), from 2029. 


With about 18 million Higgs bosons projected to be produced in each experiment in Run 3 and some 180 million in the HL-LHC’s runs, the collaborations expect to not only reduce significantly the measurement uncertainties of the Higgs boson’s interactions determined so far but also to observe some of the Higgs boson’s interactions with the lighter matter particles and to obtain the first significant evidence of the boson’s interaction with itself.




Daily Today


<저작권자 © 데일리투데이, 무단 전재 및 재배포 금지>

0
기사수정 (조회수:613건)   

다른 곳에 퍼가실 때는 아래 고유 링크 주소를 출처로 사용해주세요.

http://dailytoday.co.kr/news/view.php?idx=71735
데일리투데이 후원 배너2
많이 본 기사-로컬
  1. 1 [데일리투데이] 경기도-권익위, ‘행정심판 정책간담회’ 개최
  2. 2 [데일리투데이] 2021경기세계도자비엔날레, 대중이 직접 뽑은 최고 작품은?
  3. 3 [데일리투데이] 경남도, ‘2021년 부울경 온라인 일자리박람회’ 개최
  4. 4 [데일리투데이] 경상남도소방본부, ‘119 안전 콘텐츠 공모전’ 개최
  5. 5 [데일리투데이-현장] 고양시의 환대에 감동한 세계스카우트잼버리 대원들
  6. 6 [데일리투데이] 고양시, 폐기물처리시설 신규건립을 통한 ‘그린인프라 사업 계획’ 발표
  7. 7 [데일리투데이] ‘더 글로리’ 촬영지, 명소 되나?...인천시, 관광자원화 추진
  8. 8 [데일리투데이] 김포문화재단, ESG 경영 실천 이벤트 ‘한옥마을 채종 씨앗 나눔’ 운영
  9. 9 [데일리투데이] 경기도농업기술원, ‘제12기 경기농업대학 졸업식’ 개최
  10. 10 [데일리투데이] 꽃박람회 재단, 지속가능한 화훼·농업 발전...‘미래정원’사업 추진
  11. 11 [데일리투데이] 부천시, 6급 팀장 대상 리더십 역량강화를 위한 워크숍 개최
  12. 12 [데일리투데이] 2023년 고양시 노동안전지킴이 활동 개시...발대식 개최
  13. 13 [데일리투데이] 유정복 시장, 추석 명절 맞아 국군장병들과 소통하고 격려
  14. 14 [데일리투데이] 인천시, 미래 수산업 이끌 청·장년에게 최대 5억 원 융자 지원
  15. 15 [데일리투데이] 고양시, 초등학생 대상 찾아가는 장애발생예방교육 실시
  16. 16 [데일리투데이] 인천시, 초등학생 대상‘나만의 덕률풍 램프 만들기’ 체험 운영
  17. 17 [데일리투데이] 경기도, ‘소부장 스타기업’ 육성한다…19개 기업에 사업화 자금 지원
  18. 18 [데일리투데이] 경기도, 총선·설 명절 대비 공직기강 특별감찰 실시
  19. 19 [데일리투데이] 송도국제도시 워터프런트 1-2단계 착공
  20. 20 [데일리투데이] 인천시, 최대 월 20만 원 청년월세 지원 대상자 모집
모바일 버전 바로가기