Search for Neutral, Long-Lived Particles Decaying into Two Muons in<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>p</mml:mi><mml:mover accent="true"><mml:mi>p</mml:mi><mml:mo>¯</mml:mo></mml:mover></mml:math>Collisions at<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msqrt><mml:mi>s</mml:mi></mml:msqrt><mml:mo>=</mml:mo><mml:mn>1.96</mml:mn><mml:mtext> </mml:mtext><mml:mtext> </mml:mtext><mml:mi>TeV</mml:mi></mml:math>

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R.; Xie, Y.; Xuân, Nguyễn Thị; Yacoob, S.; Yamada, R.; Yan, M.; Yasuda, T.; Yatsunenko, Y. A.; Yip, K.; Yoo, H. D.; Youn, S. W.; Yu, C.; Yu, J.; Yurkewicz, A.; Zatserklyaniy, A.; Zeitnitz, C.; Zhang, D.; Zhao, T.; Zhou, B.; Zhu, J.; Zieliński, M.; Ziemińska, D.; Ziemiński, A.; Zutshi, V.; Zverev, E. G.

doi:10.1103/physrevlett.97.161802

Cited by 35 publications

(25 citation statements)

References 20 publications

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“…These signatures offer opportunities for LHCb [76,77] as well as ATLAS and CMS, but we do not cover them here. A number of relevant experimental searches have already been performed [78][79][80][81][82][83][84][85][86][87][88][89][90][91][92][93][94][95]. In the following sections we examine most of the above decay modes in detail, outline their theoretical motivations, and review existing collider studies and relevant experimental searches.…”

Section: B Exotic-decay Modes Of the 125 Gev Higgs Bosonmentioning

confidence: 99%

“…An example of a natural theory where such particles may arise in Higgs decays [76] is the twin Higgs [226], though the details are still to be worked out. This issue takes us beyond our current purposes, but this possibility has already received some amount of experimental study, as in [78][79][80][81][82][83][84][85][86][87][88][89][90][91][92][93][94][95]229,230] II. h → E T…”

Section: Hidden Valleysmentioning

confidence: 99%

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Exotic decays of the 125 GeV Higgs boson

et al. 2014

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We perform an extensive survey of nonstandard Higgs decays that are consistent with the 125 GeV Higgs-like resonance. Our aim is to motivate a large set of new experimental analyses on the existing and forthcoming data from the Large Hadron Collider (LHC). The explicit search for exotic Higgs decays presents a largely untapped discovery opportunity for the LHC collaborations, as such decays may be easily missed by other searches. We emphasize that the Higgs is uniquely sensitive to the potential existence of new weakly coupled particles and provide a unified discussion of a large class of both simplified and complete models that give rise to characteristic patterns of exotic Higgs decays. We assess the status of exotic Higgs decays after LHC run I. In many cases we are able to set new nontrivial constraints by reinterpreting existing experimental analyses. We point out that improvements are possible with dedicated analyses and perform some preliminary collider studies. We prioritize the analyses according to their theoretical motivation and their experimental feasibility. This document is accompanied by a Web site that will be continuously updated with further information [http://exotichiggs.physics .sunysb.edu].

show abstract

Section: B Exotic-decay Modes Of the 125 Gev Higgs Bosonmentioning

confidence: 99%

Section: Hidden Valleysmentioning

confidence: 99%

Exotic decays of the 125 GeV Higgs boson

et al. 2014

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show abstract

“…This scenario is depicted in the middle panel of figure 5. The CMS 9 Searches for displaced vertices and long lived particles decaying inside the detector are currently ongoing at the LHC (see for example [21]) and were performed at the Tevatron [22][23][24][25][26], but there is still no systematic coverage of all the possible lifetimes and final states. We will ignore this possibility in what follows, even though experimentally it is intriguing and could be the subject of a dedicated study.…”

Section: Jhep01(2013)149mentioning

confidence: 99%

2:1 for naturalness at the LHC?

Arkani-Hamed

Blum

D’Agnolo

et al. 2013

J. High Energ. Phys.

129

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A large enhancement of a factor of 1.5 -2 in Higgs production and decay in the diphoton channel, with little deviation in the ZZ channel, can only plausibly arise from a loop of new charged particles with large couplings to the Higgs. We show that, allowing only new fermions with marginal interactions at the weak scale, the required Yukawa couplings for a factor of 2 enhancement are so large that the Higgs quartic coupling is pushed to large negative values in the UV, triggering an unacceptable vacuum instability far beneath the 10 TeV scale. An enhancement by a factor of 1.5 can be accommodated if the charged particles are lighter than 150 GeV, within reach of discovery in almost all cases in the 8 TeV run at the LHC, and in even the most difficult cases at 14 TeV. Thus if the diphoton enhancement survives further scrutiny, and no charged particles beneath 150 GeV are found, there must be new bosons far beneath the 10 TeV scale. This would unambiguously rule out a large class of fine-tuned theories for physics beyond the Standard Model, including split SUSY and many of its variants, and provide strong circumstantial evidence for a natural theory of electroweak symmetry breaking at the TeV scale. Alternately, theories with only a single fine-tuned Higgs and new fermions at the weak scale, with no additional scalars or gauge bosons up to a cutoff much larger than the 10 TeV scale, unambiguously predict that the hints for a large diphoton enhancement in the current data will disappear.

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“…The D0 Collaboration has performed similar searches for leptons from displaced decays within its tracker volume [7,8], yet the scope of these searches covers a much smaller kinematic phase space region than CMS. The ATLAS Collaboration has performed searches that are sensitive to decay lengths up to about 20 m by exploiting the ATLAS muon spectrometer [9,10], using di↵erent decay channels from those considered in this analysis.…”

mentioning

confidence: 99%

Search for New Physical Phenomena via Displaced Muon Signatures with the CMS Detector at the LHC

Solmaz¹

2014

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Search for Neutral, Long-Lived Particles Decaying into Two Muons inpp¯Collisions ats=1.96 TeV

Cited by 35 publications

References 20 publications

Exotic decays of the 125 GeV Higgs boson

Exotic decays of the 125 GeV Higgs boson

2:1 for naturalness at the LHC?

Search for New Physical Phenomena via Displaced Muon Signatures with the CMS Detector at the LHC

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