Naturalness in D-brane inspired models

doi:10.1007/JHEP07(2019)048

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	Naturalness in D-brane inspired models
	De Benedetti, Ron ; Li, Tianjun 4,5; Maxin, James A.; Nanopoulos, Dimitri V.
刊名	JOURNAL OF HIGH ENERGY PHYSICS
	2019
期号	7 页码:48
关键词	FLIPPED SU(5) SCALE SEARCH CMS
ISSN号	1029-8479
DOI	10.1007/JHEP07(2019)048
英文摘要	We examine the naturalness of the D-brane inspired model constructed in flipped SU(5) supplemented with vector-like particles at the TeV scale, dubbed flippons. We find the model can produce a mainly Higgsino-like lightest supersymmetric particle (LSP) and small light stops, as favored by naturalness. In fact, a large trilinear scalar A(t) term at the electroweak (EW) scale creates a large mass splitting between the top squarks, driving the light stop to near degeneracy with an LSP that is almost all Higgsino, with Delta M thus far. Given the smallness of the light stop, generating a 125 GeV light Higgs boson mass is aided by one-loop contributions from the Yukawa couplings between the flippons and Higgs fields. The resulting parameter space satisfying naturalness is rather constrained, thus we assess its viability by means of comparison to the LHC constraint on soft charm jets and direction detection limits on spin-independent cross-sections. Finally, we compute the level of electroweak fine-tuning and uncover a region with Delta(EW)< 30, i.e., fine-tuning better than 3%, regarded as low electroweak fine-tuning. Given the small light stop, the electroweak fine-tuning from only the top squarks is of O(1), indicating no fine-tuning from neither the light stop <(t)over tilde>2.
学科主题	Physics
语种	英语
内容类型	期刊论文
源URL	[http://ir.itp.ac.cn/handle/311006/27031]
专题	理论物理研究所_理论物理所1978-2010年知识产出
作者单位	1.Univ Chinese Acad Sci, Sch Phys Sci, 19A Yuquan Rd, Beijing 100049, Peoples R China 2.Nanopoulos, Dimitri V.] Acad Athens, Div Nat Sci, 28 Panepistimiou Ave, Athens 10679, Greece 3.Nanopoulos, Dimitri V.] HARC, Astroparticle Phys Grp, Mitchell Campus, The Woodlands, TX 77381 USA 4.[De Benedetti, Ron; Maxin, James A.] Louisiana State Univ, Dept Chem & Phys, Shreveport, LA 71115 USA 5.Chinese Acad Sci, Inst Theoret Phys, CAS Key Lab Theoret Phys, Beijing 100190, Peoples R China 6.Nanopoulos, Dimitri V.] Texas A&M Univ, George P & Cynthia W Mitchell Inst Fundamental Ph, College Stn, TX 77843 USA
推荐引用方式 GB/T 7714	De Benedetti, Ron,Li, Tianjun,Maxin, James A.,et al. Naturalness in D-brane inspired models[J]. JOURNAL OF HIGH ENERGY PHYSICS,2019(7):48.
APA	De Benedetti, Ron,Li, Tianjun,Maxin, James A.,&Nanopoulos, Dimitri V..(2019).Naturalness in D-brane inspired models.JOURNAL OF HIGH ENERGY PHYSICS(7),48.
MLA	De Benedetti, Ron,et al."Naturalness in D-brane inspired models".JOURNAL OF HIGH ENERGY PHYSICS .7(2019):48.