{"title":"利用 ATLAS 探测器搜索在四轻子终态中衰变为新自旋-1 玻色子的新标量","authors":"","doi":"10.1016/j.physletb.2025.139472","DOIUrl":null,"url":null,"abstract":"<div><div>A search is conducted for a new scalar boson <em>S</em>, with a mass distinct from that of the Higgs boson, decaying promptly into four leptons (<span><math><mi>ℓ</mi><mo>=</mo><mi>e</mi></math></span>, <em>μ</em>) via an intermediate state containing two on-shell, promptly decaying new spin-1 bosons <span><math><msub><mrow><mi>Z</mi></mrow><mrow><mtext>d</mtext></mrow></msub></math></span>: <span><math><mi>S</mi><mo>→</mo><msub><mrow><mi>Z</mi></mrow><mrow><mtext>d</mtext></mrow></msub><msub><mrow><mi>Z</mi></mrow><mrow><mtext>d</mtext></mrow></msub><mo>→</mo><mn>4</mn><mi>ℓ</mi></math></span>, where the <span><math><msub><mrow><mi>Z</mi></mrow><mrow><mtext>d</mtext></mrow></msub></math></span> boson has a mass between 15 and 300 GeV, and the <em>S</em> boson has a mass between either 30 and 115 GeV or 130 and 800 GeV. The search uses proton–proton collision data collected with the ATLAS detector at the Large Hadron Collider with an integrated luminosity of 139 fb<sup>−1</sup> at a centre-of-mass energy of <span><math><msqrt><mrow><mi>s</mi></mrow></msqrt><mo>=</mo><mn>13</mn></math></span> TeV. No significant excess above the Standard Model background expectation is observed. Upper limits at 95% confidence level are set on the production cross-section times branching ratio, <span><math><mi>σ</mi><mo>(</mo><mi>g</mi><mi>g</mi><mo>→</mo><mi>S</mi><mo>)</mo><mo>×</mo><mi>B</mi><mo>(</mo><mi>S</mi><mo>→</mo><msub><mrow><mi>Z</mi></mrow><mrow><mtext>d</mtext></mrow></msub><msub><mrow><mi>Z</mi></mrow><mrow><mtext>d</mtext></mrow></msub><mo>→</mo><mn>4</mn><mi>ℓ</mi><mo>)</mo></math></span>, as a function of the mass of both particles, <span><math><msub><mrow><mi>m</mi></mrow><mrow><mi>S</mi></mrow></msub></math></span> and <span><math><msub><mrow><mi>m</mi></mrow><mrow><mi>Z</mi><mtext>d</mtext></mrow></msub></math></span>.</div></div>","PeriodicalId":20162,"journal":{"name":"Physics Letters B","volume":"865 ","pages":"Article 139472"},"PeriodicalIF":4.3000,"publicationDate":"2025-04-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Search for a new scalar decaying into new spin-1 bosons in four-lepton final states with the ATLAS detector\",\"authors\":\"\",\"doi\":\"10.1016/j.physletb.2025.139472\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><div>A search is conducted for a new scalar boson <em>S</em>, with a mass distinct from that of the Higgs boson, decaying promptly into four leptons (<span><math><mi>ℓ</mi><mo>=</mo><mi>e</mi></math></span>, <em>μ</em>) via an intermediate state containing two on-shell, promptly decaying new spin-1 bosons <span><math><msub><mrow><mi>Z</mi></mrow><mrow><mtext>d</mtext></mrow></msub></math></span>: <span><math><mi>S</mi><mo>→</mo><msub><mrow><mi>Z</mi></mrow><mrow><mtext>d</mtext></mrow></msub><msub><mrow><mi>Z</mi></mrow><mrow><mtext>d</mtext></mrow></msub><mo>→</mo><mn>4</mn><mi>ℓ</mi></math></span>, where the <span><math><msub><mrow><mi>Z</mi></mrow><mrow><mtext>d</mtext></mrow></msub></math></span> boson has a mass between 15 and 300 GeV, and the <em>S</em> boson has a mass between either 30 and 115 GeV or 130 and 800 GeV. The search uses proton–proton collision data collected with the ATLAS detector at the Large Hadron Collider with an integrated luminosity of 139 fb<sup>−1</sup> at a centre-of-mass energy of <span><math><msqrt><mrow><mi>s</mi></mrow></msqrt><mo>=</mo><mn>13</mn></math></span> TeV. No significant excess above the Standard Model background expectation is observed. Upper limits at 95% confidence level are set on the production cross-section times branching ratio, <span><math><mi>σ</mi><mo>(</mo><mi>g</mi><mi>g</mi><mo>→</mo><mi>S</mi><mo>)</mo><mo>×</mo><mi>B</mi><mo>(</mo><mi>S</mi><mo>→</mo><msub><mrow><mi>Z</mi></mrow><mrow><mtext>d</mtext></mrow></msub><msub><mrow><mi>Z</mi></mrow><mrow><mtext>d</mtext></mrow></msub><mo>→</mo><mn>4</mn><mi>ℓ</mi><mo>)</mo></math></span>, as a function of the mass of both particles, <span><math><msub><mrow><mi>m</mi></mrow><mrow><mi>S</mi></mrow></msub></math></span> and <span><math><msub><mrow><mi>m</mi></mrow><mrow><mi>Z</mi><mtext>d</mtext></mrow></msub></math></span>.</div></div>\",\"PeriodicalId\":20162,\"journal\":{\"name\":\"Physics Letters B\",\"volume\":\"865 \",\"pages\":\"Article 139472\"},\"PeriodicalIF\":4.3000,\"publicationDate\":\"2025-04-16\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Physics Letters B\",\"FirstCategoryId\":\"101\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S0370269325002333\",\"RegionNum\":2,\"RegionCategory\":\"物理与天体物理\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"ASTRONOMY & ASTROPHYSICS\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Physics Letters B","FirstCategoryId":"101","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0370269325002333","RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"ASTRONOMY & ASTROPHYSICS","Score":null,"Total":0}
Search for a new scalar decaying into new spin-1 bosons in four-lepton final states with the ATLAS detector
A search is conducted for a new scalar boson S, with a mass distinct from that of the Higgs boson, decaying promptly into four leptons (, μ) via an intermediate state containing two on-shell, promptly decaying new spin-1 bosons : , where the boson has a mass between 15 and 300 GeV, and the S boson has a mass between either 30 and 115 GeV or 130 and 800 GeV. The search uses proton–proton collision data collected with the ATLAS detector at the Large Hadron Collider with an integrated luminosity of 139 fb−1 at a centre-of-mass energy of TeV. No significant excess above the Standard Model background expectation is observed. Upper limits at 95% confidence level are set on the production cross-section times branching ratio, , as a function of the mass of both particles, and .
期刊介绍:
Physics Letters B ensures the rapid publication of important new results in particle physics, nuclear physics and cosmology. Specialized editors are responsible for contributions in experimental nuclear physics, theoretical nuclear physics, experimental high-energy physics, theoretical high-energy physics, and astrophysics.