CMS-PAS-HIG-18-003 | ||
A search for pair production of new light bosons decaying into muons at $\sqrt{s}= $ 13 TeV | ||
CMS Collaboration | ||
July 2018 | ||
Abstract: This letter presents a search for new light bosons decaying into muon pairs using a data sample corresponding to an integrated luminosity of 35.9 fb$^{-1}$ of proton-proton collisions at a center-of-mass energy $\sqrt{s} = $ 13 TeV collected with the CMS detector at the CERN LHC. The search is model independent, only requiring the pair production of a new light boson and its subsequent decay to a pair of muons. No significant deviation is observed from the predicted background and a model independent limit is set on the product of the cross section, branching ratio, and acceptance as a function of mass. This limit varies between 0.16 fb and 0.45 fb over a range of new light boson masses from 0.25 GeV to 8.5 GeV. It is then interpreted in the context of the Next-to-Minimal Supersymmetric Standard Model and a dark supersymmetry model that allows for non-negligible light boson lifetimes. | ||
Links:
CDS record (PDF) ;
CADI line (restricted) ;
These preliminary results are superseded in this paper, PLB 796 (2019) 131. The superseded preliminary plots can be found here. |
Figures | |
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Figure 1:
Left: The distribution of the invariant masses $m_{({\mu} {\mu})_1}$ vs. $m_{({\mu} {\mu})_2}$ for the isolated dimuon systems. There are 56 events in the data (bullets) that pass all selection criteria except for the $m_{({\mu} {\mu})_1} \simeq m_{({\mu} {\mu})_2}$ requirement and thus fall outside the diagonal region. The diagonal signal region $m_{({\mu} {\mu})_1} \simeq m_{({\mu} {\mu})_2}$ (outlined with dashed lines) contains the 13 events observed in data (triangles) that pass all selection criteria. The expected SM background distribution is indicated by the color scale. Right: The 95% CL upper limit set on ${\sigma ({\mathrm {p}} {\mathrm {p}}\to 2 \text {a} + \text {X}) \times \mathcal {B}^2 (\text {a} \rightarrow 2 {\mu}) \times \alpha _\text {Gen}}$ over the range 0.25 $ < m_{{\mathrm {a}}} < $ 8.5 GeV. |
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Figure 1-a:
Left: The distribution of the invariant masses $m_{({\mu} {\mu})_1}$ vs. $m_{({\mu} {\mu})_2}$ for the isolated dimuon systems. There are 56 events in the data (bullets) that pass all selection criteria except for the $m_{({\mu} {\mu})_1} \simeq m_{({\mu} {\mu})_2}$ requirement and thus fall outside the diagonal region. The diagonal signal region $m_{({\mu} {\mu})_1} \simeq m_{({\mu} {\mu})_2}$ (outlined with dashed lines) contains the 13 events observed in data (triangles) that pass all selection criteria. The expected SM background distribution is indicated by the color scale. Right: The 95% CL upper limit set on ${\sigma ({\mathrm {p}} {\mathrm {p}}\to 2 \text {a} + \text {X}) \times \mathcal {B}^2 (\text {a} \rightarrow 2 {\mu}) \times \alpha _\text {Gen}}$ over the range 0.25 $ < m_{{\mathrm {a}}} < $ 8.5 GeV. |
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Figure 1-b:
Left: The distribution of the invariant masses $m_{({\mu} {\mu})_1}$ vs. $m_{({\mu} {\mu})_2}$ for the isolated dimuon systems. There are 56 events in the data (bullets) that pass all selection criteria except for the $m_{({\mu} {\mu})_1} \simeq m_{({\mu} {\mu})_2}$ requirement and thus fall outside the diagonal region. The diagonal signal region $m_{({\mu} {\mu})_1} \simeq m_{({\mu} {\mu})_2}$ (outlined with dashed lines) contains the 13 events observed in data (triangles) that pass all selection criteria. The expected SM background distribution is indicated by the color scale. Right: The 95% CL upper limit set on ${\sigma ({\mathrm {p}} {\mathrm {p}}\to 2 \text {a} + \text {X}) \times \mathcal {B}^2 (\text {a} \rightarrow 2 {\mu}) \times \alpha _\text {Gen}}$ over the range 0.25 $ < m_{{\mathrm {a}}} < $ 8.5 GeV. |
png pdf |
Figure 2:
Left: The 95% CL upper limits in the NMSSM scenario as functions of ${m_{\text {h}_1}}$ on ${\sigma ({\mathrm {p}} {\mathrm {p}}\to \text {h}_{1,2} \to 2 \text {a}_1) \times \mathcal {B}^2(\text {a}_1 \to 2 {\mu})}$ with $m_{\text {a}_1} = $ 0.25 GeV (dashed curve) and $m_{\text {a}_1} = $ 3.55 GeV (dotted curve). The limits are compared to a representative predicted rate (solid curve) obtained using a simplified scenario where $\sigma ({\mathrm {p}} {\mathrm {p}}\to \text {h}_1)=\sigma _\mathrm {SM}(m_{\text {h}_1})$ [60], ${\sigma ({\mathrm {p}} {\mathrm {p}}\to \text {h}_2) \times \mathcal {B}(\text {h}_{2} \rightarrow 2 \text {a}_1) = 0}$, $\mathcal {B}(\text {h}_1 \to 2 \text {a}_1) = 0.3%$, and $\mathcal {B}(\text {a}_1 \to 2 {\mu}) = 7.7%$. For the chosen $\mathcal {B}(\text {a}_1 \to 2 {\mu})$, taken from [46], $m_{\text {a}_1} = $ 2 GeV and NMSSM parameter $\tan\beta = 20$. The figure is separated into two regions: $m_{\text {h}_i}=m_{\text {h}_1} < 125 GeV $ with $m_{\text {h}_2}$ = 125 GeV (unshaded), and $m_{\text {h}_1}$ = 125 GeV with $m_{\text {h}_i}=m_{\text {h}_2} > 125 GeV $ (shaded). Right: The 95% CL upper limits as functions of $m_{\text {a}_1}$ in the NMSSM scenario on $\sigma ({\mathrm {p}} {\mathrm {p}}\to \text {h}_{1,2} \to 2 \text {a}_1) \times \mathcal {B}^2(\text {a}_1 \to 2 {\mu})$ with $m_{\text {h}_1} = $ 90 GeV (dashed curve), $m_{\text {h}_1} = $ 125 GeV (dash-dotted curve), and $m_{\text {h}_1} = $ 150 GeV (dotted curve). These limits are compared to a representative predicted rate (solid curve) from a simplified case in which $\mathcal {B}(\text {h}_{1} \to 2 \text {a}_1) = 0.3%$, $\sigma ({\mathrm {p}} {\mathrm {p}}\to \text {h}_{1})=\sigma _\mathrm {SM}(m_{\text {h}_{1}} = 125 GeV)$ [60], and $\sigma ({\mathrm {p}} {\mathrm {p}}\to \text {h}_2) \times \mathcal {B}(\text {h}_{2} \rightarrow 2 \text {a}_1) = 0$. Additionally, $\mathcal {B}(\text {a}_1 \to 2 {\mu})$ as a function of $m_{\text {a}_1}$ is taken from [46] and assumes that the NMSSM parameter $\tan\beta $ is 20. The simplified scenario includes gg-fusion, VBF, and VH production modes. The structures in the predicted curves arise because $\mathcal {B}(\text {a}_1 \rightarrow gg)$ varies rapidly as $m_{\text {a}_1}$ crosses internal quark loop thresholds [46]. |
png pdf |
Figure 2-a:
Left: The 95% CL upper limits in the NMSSM scenario as functions of ${m_{\text {h}_1}}$ on ${\sigma ({\mathrm {p}} {\mathrm {p}}\to \text {h}_{1,2} \to 2 \text {a}_1) \times \mathcal {B}^2(\text {a}_1 \to 2 {\mu})}$ with $m_{\text {a}_1} = $ 0.25 GeV (dashed curve) and $m_{\text {a}_1} = $ 3.55 GeV (dotted curve). The limits are compared to a representative predicted rate (solid curve) obtained using a simplified scenario where $\sigma ({\mathrm {p}} {\mathrm {p}}\to \text {h}_1)=\sigma _\mathrm {SM}(m_{\text {h}_1})$ [60], ${\sigma ({\mathrm {p}} {\mathrm {p}}\to \text {h}_2) \times \mathcal {B}(\text {h}_{2} \rightarrow 2 \text {a}_1) = 0}$, $\mathcal {B}(\text {h}_1 \to 2 \text {a}_1) = 0.3%$, and $\mathcal {B}(\text {a}_1 \to 2 {\mu}) = 7.7%$. For the chosen $\mathcal {B}(\text {a}_1 \to 2 {\mu})$, taken from [46], $m_{\text {a}_1} = $ 2 GeV and NMSSM parameter $\tan\beta = 20$. The figure is separated into two regions: $m_{\text {h}_i}=m_{\text {h}_1} < 125 GeV $ with $m_{\text {h}_2}$ = 125 GeV (unshaded), and $m_{\text {h}_1}$ = 125 GeV with $m_{\text {h}_i}=m_{\text {h}_2} > 125 GeV $ (shaded). Right: The 95% CL upper limits as functions of $m_{\text {a}_1}$ in the NMSSM scenario on $\sigma ({\mathrm {p}} {\mathrm {p}}\to \text {h}_{1,2} \to 2 \text {a}_1) \times \mathcal {B}^2(\text {a}_1 \to 2 {\mu})$ with $m_{\text {h}_1} = $ 90 GeV (dashed curve), $m_{\text {h}_1} = $ 125 GeV (dash-dotted curve), and $m_{\text {h}_1} = $ 150 GeV (dotted curve). These limits are compared to a representative predicted rate (solid curve) from a simplified case in which $\mathcal {B}(\text {h}_{1} \to 2 \text {a}_1) = 0.3%$, $\sigma ({\mathrm {p}} {\mathrm {p}}\to \text {h}_{1})=\sigma _\mathrm {SM}(m_{\text {h}_{1}} = 125 GeV)$ [60], and $\sigma ({\mathrm {p}} {\mathrm {p}}\to \text {h}_2) \times \mathcal {B}(\text {h}_{2} \rightarrow 2 \text {a}_1) = 0$. Additionally, $\mathcal {B}(\text {a}_1 \to 2 {\mu})$ as a function of $m_{\text {a}_1}$ is taken from [46] and assumes that the NMSSM parameter $\tan\beta $ is 20. The simplified scenario includes gg-fusion, VBF, and VH production modes. The structures in the predicted curves arise because $\mathcal {B}(\text {a}_1 \rightarrow gg)$ varies rapidly as $m_{\text {a}_1}$ crosses internal quark loop thresholds [46]. |
png pdf |
Figure 2-b:
Left: The 95% CL upper limits in the NMSSM scenario as functions of ${m_{\text {h}_1}}$ on ${\sigma ({\mathrm {p}} {\mathrm {p}}\to \text {h}_{1,2} \to 2 \text {a}_1) \times \mathcal {B}^2(\text {a}_1 \to 2 {\mu})}$ with $m_{\text {a}_1} = $ 0.25 GeV (dashed curve) and $m_{\text {a}_1} = $ 3.55 GeV (dotted curve). The limits are compared to a representative predicted rate (solid curve) obtained using a simplified scenario where $\sigma ({\mathrm {p}} {\mathrm {p}}\to \text {h}_1)=\sigma _\mathrm {SM}(m_{\text {h}_1})$ [60], ${\sigma ({\mathrm {p}} {\mathrm {p}}\to \text {h}_2) \times \mathcal {B}(\text {h}_{2} \rightarrow 2 \text {a}_1) = 0}$, $\mathcal {B}(\text {h}_1 \to 2 \text {a}_1) = 0.3%$, and $\mathcal {B}(\text {a}_1 \to 2 {\mu}) = 7.7%$. For the chosen $\mathcal {B}(\text {a}_1 \to 2 {\mu})$, taken from [46], $m_{\text {a}_1} = $ 2 GeV and NMSSM parameter $\tan\beta = 20$. The figure is separated into two regions: $m_{\text {h}_i}=m_{\text {h}_1} < 125 GeV $ with $m_{\text {h}_2}$ = 125 GeV (unshaded), and $m_{\text {h}_1}$ = 125 GeV with $m_{\text {h}_i}=m_{\text {h}_2} > 125 GeV $ (shaded). Right: The 95% CL upper limits as functions of $m_{\text {a}_1}$ in the NMSSM scenario on $\sigma ({\mathrm {p}} {\mathrm {p}}\to \text {h}_{1,2} \to 2 \text {a}_1) \times \mathcal {B}^2(\text {a}_1 \to 2 {\mu})$ with $m_{\text {h}_1} = $ 90 GeV (dashed curve), $m_{\text {h}_1} = $ 125 GeV (dash-dotted curve), and $m_{\text {h}_1} = $ 150 GeV (dotted curve). These limits are compared to a representative predicted rate (solid curve) from a simplified case in which $\mathcal {B}(\text {h}_{1} \to 2 \text {a}_1) = 0.3%$, $\sigma ({\mathrm {p}} {\mathrm {p}}\to \text {h}_{1})=\sigma _\mathrm {SM}(m_{\text {h}_{1}} = 125 GeV)$ [60], and $\sigma ({\mathrm {p}} {\mathrm {p}}\to \text {h}_2) \times \mathcal {B}(\text {h}_{2} \rightarrow 2 \text {a}_1) = 0$. Additionally, $\mathcal {B}(\text {a}_1 \to 2 {\mu})$ as a function of $m_{\text {a}_1}$ is taken from [46] and assumes that the NMSSM parameter $\tan\beta $ is 20. The simplified scenario includes gg-fusion, VBF, and VH production modes. The structures in the predicted curves arise because $\mathcal {B}(\text {a}_1 \rightarrow gg)$ varies rapidly as $m_{\text {a}_1}$ crosses internal quark loop thresholds [46]. |
png pdf |
Figure 3:
The 90% CL upper limits (black solid curves) from this search as interpreted in the dark SUSY scenario, where $\sigma ({\mathrm {p}} {\mathrm {p}}\to {\mathrm {h}} +\mathrm{X}) \, \mathcal {B}({\mathrm {h}} \to 2{{\gamma}}_{D} + \mathrm{X})$ with $m_{\mathrm {n}_1}=$ 10 GeV, $m_{\mathrm {n}_{\mathrm {D}}}=$ 1 GeV. The limits are presented in the plane of the parameters ($\varepsilon $ and $m_{{{\gamma}}_{D}}$). Constraints from other experiments [21,61,62,63,64,65,66,67,68,69,70,71,72,73,74,75] showing their 90% CL exclusion contours are also shown. The colored contours for the CMS and ATLAS limits represent different values of $\mathcal {B}({\mathrm {h}} \to 2{{\gamma}}_{D} + \mathrm{X})$ that range from 0.1 to 40%. |
Tables | |
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Table 1:
The full reconstruction efficiency over signal acceptance $\epsilon _\mathrm {Full}/\alpha _\mathrm {Gen}$ in% for several representative signal NMSSM (top) and dark SUSY benchmark models (bottom). |
Summary |
A search for pairs of new light bosons that subsequently decay to pairs of oppositely charged muons is presented in this Letter. This search is developed in the context of a Higgs boson decay, $\mathrm{h} \rightarrow 2\mathrm{A}+\mathrm{X}\rightarrow 4\mu+\mathrm{X}$ and is performed on a data sample collected by the CMS experiment in 2016 that corresponds to an integrated luminosity of 35.9 fb$^{-1}$ proton-proton collisions with $\sqrt{s}= $ 13 TeV. This dataset is larger and collected at a higher center-of-mass energy than the previous version of this search [15]. Additionally, both the mass range of the a boson and the maximum possible displacement of its decay vertex are extended compared to the previous publication of this analysis. Thirteen events are observed in the signal region, with 9.90 $\pm$ 1.24 (stat) $\pm$ 1.84 (syst) events expected from the SM backgrounds. The distribution of events in the signal region is consistent with SM expectations. A model independent 95% CL upper limit on the product of the cross section, branching fraction, and acceptance is set over the mass range 0.25 $ < m_{\mathrm{A}} < $ 8.5 GeV. This model independent limit is then interpreted in the context of dark SUSY with non-negligible light boson lifetime and the NMSSM. In the dark SUSY interpretation of the result, the new limit constrains previously unexamined ranges of $\varepsilon$ and $m_{\gamma_D}$. |
References | ||||
1 | M. Maniatis | The next-to-minimal supersymmetric extension of the standard model reviewed | Int. J. Mod. Phys. A 25 (2010) 3505 | 0906.0777 |
2 | L. D. Duffy and K. van Bibber | Axions as dark matter particles | New J. Phys 11 (2009) 105008 | hep-ph/0904.3346 |
3 | N. Arkani-Hamed, D. P. Finkbeiner, T. R. Slatyer, and N. Weiner | A theory of dark matter | PRD 79 (2009) 015014 | 0810.0713 |
4 | A. Belyaev et al. | LHC discovery potential of the lightest NMSSM Higgs boson in the $ {h}_{1} {\rightarrow}{a}_{1}{a}_{1} {\rightarrow}4 {\mu} $ channel | PRD 81 (2010) 075021 | hep-ph/1002.1956 |
5 | P. Fayet | Supergauge invariant extension of the Higgs mechanism and a model for the electron and its neutrino | NPB 90 (1975) 104 | |
6 | R. K. Kaul and P. Majumdar | Cancellation of quadratically divergent mass corrections in globally supersymmetric spontaneously broken gauge theories | NPB 199 (1982) 36 | |
7 | R. Barbieri, S. Ferrara, and C. A. Savoy | Gauge models with spontaneously broken local supersymmetry | PLB 119 (1982) 343 | |
8 | H. P. Nilles, M. Srednicki, and D. Wyler | Weak interaction breakdown induced by supergravity | PL120 (1983) 346 | |
9 | J.-M. Frere, D. R. T. Jones, and S. Raby | Fermion masses and induction of the weak scale by supergravity | NPB 222 (1983) 11 | |
10 | J.-P. Derendinger and C. A. Savoy | Quantum effects and SU(2)$ \times $U(1) breaking in supergravity gauge theories | NPB 237 (1984) 307 | |
11 | M. Drees | Supersymmetric models with extended Higgs sector | Int. J. Mod. Phys. A 4 (1989) 3635 | |
12 | U. Ellwanger, C. Hugonie, and A. M. Teixeira | The next-to-minimal supersymmetric standard model | PR 496 (2010) 1 | 0910.1785 |
13 | M. Baumgart et al. | Non-abelian dark sectors and their collider signatures | JHEP 04 (2009) 014 | 0901.0283 |
14 | A. Falkowski, J. T. Ruderman, T. Volansky, and J. Zupan | Hidden Higgs decaying to lepton jets | JHEP 05 (2010) 077 | 1002.2952 |
15 | CMS Collaboration | A search for pair production of new light bosons decaying into muons | PLB 752 (2016) 146 | CMS-HIG-13-010 1506.00424 |
16 | ATLAS Collaboration | Search for displaced muonic lepton jets from light Higgs boson decay in proton-proton collisions $ \sqrt{s}= $ 7 TeV with the ATLAS detector | PLB 721 (2013) 32 | 1210.0435 |
17 | CMS Collaboration | Search for light resonances decaying into pairs of muons as a signal of new physics | JHEP 07 (2011) 98 | CMS-EXO-11-013 1106.2375 |
18 | CMS Collaboration | Search for a very light NMSSM Higgs boson produced in decays of the 125 GeV scalar boson and decaying into $ \tau $ leptons in pp collisions at $ \sqrt{s}= $ 8 TeV | JHEP 01 (2016) 079 | CMS-HIG-14-019 1510.06534 |
19 | ATLAS Collaboration | Search for new light gauge bosons in Higgs boson decays to four-lepton final states in pp collisions at $ \sqrt{s}= $ 8 TeV with the ATLAS detector at the LHC | PRD 92 (2015) 092001 | 1505.07645 |
20 | ATLAS Collaboration | Search for Higgs boson decays to beyond-the-Standard-Model light bosons in four-lepton events with the ATLAS detector at $ \sqrt{s}= $ 13 TeV | Submitted to \it JHEP | 1802.03388 |
21 | ATLAS Collaboration | Search for long-lived neutral particles decaying into lepton jets in proton--proton collisions at $ \sqrt{s} = $ 8 TeV with the ATLAS detector | JHEP 11 (2014) 88 | 1409.0746 |
22 | ATLAS Collaboration | Search for the Higgs boson produced in association with a W boson and decaying to four b-quarks via two spin-zero particles in pp collisions at 13 TeV with the ATLAS detector | EPJC 76 (2016) 605 | 1606.08391 |
23 | ATLAS Collaboration | Search for the Higgs boson produced in association with a vector boson and decaying into two spin-zero particles in the $ H \rightarrow aa \rightarrow 4b $ channel in $ pp $ collisions at $ \sqrt{s} = $ 13 TeV with the ATLAS detector | Submitted to \it JHEP | 1806.07355 |
24 | ATLAS Collaboration | Search for new phenomena in events with at least three photons collected in pp collisions at $ \sqrt{s} = $ 8 TeV with the ATLAS detector | EPJC 76 (2016) 210 | 1509.05051 |
25 | CMS Collaboration | Search for the exotic decay of the Higgs boson to a pair of light pseudoscalars in the final state with two b quarks and two $ \tau $ leptons | Submitted to \it PLB | CMS-HIG-17-024 1805.10191 |
26 | CMS Collaboration | Search for the exotic decay of the Higgs boson to a pair of light pseudoscalars in the final state of two muons and two $ \tau $ leptons at $ \sqrt{s}= $ 13 TeV | Submitted to \it JHEP | CMS-HIG-17-029 1805.04865 |
27 | LHCb Collaboration | Search for Higgs-like bosons decaying into long-lived exotic particles | The EPJC 76 (2016) 664 | 1609.03124 |
28 | CMS Collaboration | Search for a non-standard-model Higgs boson decaying to a pair of new light bosons in four-muon final states | PLB 726 (2013) 564 | CMS-EXO-12-012 1210.7619 |
29 | CMS Collaboration | Performance of the CMS muon detector and muon reconstruction with proton-proton collisions at $ \sqrt{s} = $ 13 TeV | Submitted to \it JINST | CMS-MUO-16-001 1804.04528 |
30 | CMS Collaboration | Performance of CMS muon reconstruction in $ pp $ collision events at $ \sqrt{s} = $ 7 TeV | JINST 7 (2012) P10002 | CMS-MUO-10-004 1206.4071 |
31 | CMS Collaboration | The CMS trigger system | JINST 12 (2017) P01020 | CMS-TRG-12-001 1609.02366 |
32 | CMS Collaboration | The CMS experiment at the CERN LHC | JINST 3 (2008) S08004 | CMS-00-001 |
33 | CMS Collaboration | Particle-flow reconstruction and global event description with the CMS detector | JINST 12 (2017) P10003 | CMS-PRF-14-001 1706.04965 |
34 | W. Adam, B. Mangano, T. Speer, and T. Todorov | Track reconstruction in the CMS tracker | CMS-NOTE-2006-041 | |
35 | NNPDF Collaboration | Parton distributions with QED corrections | NPB 877 (2013) 290--320 | 1308.0598 |
36 | T. Sjostrand et al. | An introduction to PYTHIA 8.2 | Computer Physics Communications 191 (2015) 159 | 1410.3012 |
37 | P. Skands, S. Carrazza, and J. Rojo | Tuning PYTHIA 8.1: the Monash 2013 tune | EPJC 74 (2014) 3024 | 1404.5630 |
38 | WMAP Collaboration | Nine-year Wilkinson microwave anisotropy probe (WMAP) observations: Cosmological parameter results | Astrophys. J. Suppl. 208 (2013) 19 | 1212.5226 |
39 | Planck Collaboration | Planck 2013 results. XVI. Cosmological parameters | Astron. Astrophys. 571 (2014) A16 | 1303.5076 |
40 | OPAL Collaboration | Decay mode independent searches for new scalar bosons with the OPAL detector at LEP | EPJC 27 (2003) 311 | hep-ex/0206022 |
41 | OPAL Collaboration | Search for a low mass CP-odd Higgs boson in $ \mathrm{e^{+}}\mathrm{e^{-}} $ collisions with the OPAL detector at LEP-2 | EPJC 27 (2003) 483 | hep-ex/0209068 |
42 | ALEPH, DELPHI, L3, OPAL, LEP Working Group for Higgs Boson Searches Collaboration | Search for neutral MSSM Higgs bosons at LEP | EPJC 47 (2006) 547 | hep-ex/0602042 |
43 | OPAL Collaboration | Search for neutral Higgs boson in CP-conserving and CP-violating MSSM scenarios | EPJC 37 (2004) 49 | hep-ex/0406057 |
44 | DELPHI Collaboration | Searches for neutral Higgs bosons in extended models | EPJC 38 (2004) 1 | hep-ex/0410017 |
45 | ALEPH Collaboration | Search for neutral Higgs bosons decaying into four taus at LEP2 | JHEP 05 (2010) 049 | 1003.0705 |
46 | R. Dermisek and J. F. Gunion | New constraints on a light CP-odd Higgs boson and related NMSSM ideal Higgs scenarios | PRD 81 (2010) 075003 | 1002.1971 |
47 | J. Alwall et al. | MadGraph/MadEvent v4: the new web generation | JHEP 09 (2007) 028 | 0706.2334 |
48 | P. Meade and M. Reece | BRIDGE: Branching ratio inquiry / decay generated events | hep-ph/0703031 | |
49 | GEANT4 Collaboration | GEANT4---a simulation toolkit | NIMA 506 (2003) 250 | |
50 | CMS Collaboration | Search for supersymmetry in pp collisions at $ \sqrt{s}= $ 13 TeV in the single-lepton final state using the sum of masses of large-radius jets | JHEP 08 (2016) 122 | 1605.04608v2 |
51 | T. Sjostrand, S. Mrenna, and P. Z. Skands | A brief introduction to PYTHIA 8.1 | CPC 178 (2008) 852 | 0710.3820 |
52 | M. Bahr et al. | Herwig++ physics and manual | EPJC 58 (2008) 639 | 0803.0883 |
53 | A. Belyaev, N. D. Christensen, and A. Pukhov | CalcHEP 3.4 for collider physics within and beyond the standard model | CPC 184 (2013) 1729 | 1207.6082 |
54 | CMS Collaboration | CMS luminosity measurements for the 2016 data taking period | CMS-PAS-LUM-17-001 | CMS-PAS-LUM-17-001 |
55 | M. Botje et al. | The PDF4LHC working group interim recommendations | 1101.0538 | |
56 | S. Alekhin et al. | The PDF4LHC working group interim report | 1101.0536 | |
57 | R. D. Ball et al. | Parton distributions with LHC data | NPB 867 (2013) 244 | 1207.1303 |
58 | J. Butterworth et al. | PDF4LHC recommendations for LHC Run II | JPG: Nucl. Part. Phys. 43 (2016) 023001 | 1510.03865v2 |
59 | J. M. Campbell and R. Ellis | Loops and legs in quantum field theory MCFM for the Tevatron and the LHC | NPB Proc. Suppl. 205 (2010) 10 | 1007.3492v1 |
60 | LHC Higgs Cross Section Working Group Collaboration | Handbook of LHC Higgs cross sections: 1. inclusive observables | 1101.0593 | |
61 | PHENIX Collaboration | Search for dark photons from neutral meson decays in $ p+p $ and $ d+\mathrm{Au} $ collisions at $ \sqrt{{s}_{NN}}= $ 200 GeV | PRC 91 (2015) 031901 | 1409.0851 |
62 | KLOE-2 Collaboration | Search for light vector boson production in $ e^+e^-\rightarrow \mu^+ \mu^-\gamma $ interactions with the KLOE experiment | PLB 736 (2014) 459 | 1404.7772 |
63 | APEX Collaboration | Search for a new gauge boson in electron-nucleus fixed-target scattering by the APEX Experiment | PRL 107 (2011) 191804 | 1108.2750 |
64 | A. Adare et al. | Search at the Mainz Microtron for light massive gauge bosons relevant for the muon g-2 anomaly | PRL 112 (2014) 221802 | 1404.5502 |
65 | HADES Collaboration | Searching a dark photon with HADES | PLB 731 (2014) 265 | 1311.0216 |
66 | BaBar Collaboration | Search for a dark photon in e+e- collisions at BABAR | PRL 113 (2014) 201801 | 1406.2980 |
67 | A. Fradette, M. Pospelov, J. Pradler, and A. Ritz | Cosmological constraints on very dark photons | PRD 90 (2014) 035022 | 1407.0993 |
68 | R. Essig et al. | Working group report: New light weakly coupled particles | 1311.0029 | |
69 | L. M. K. James B. Dent, Francesc Ferrer | Constraints on light hidden sector gauge bosons from supernova cooling | 1201.2683 | |
70 | H. K. Dreiner, J. Fortin, and L. U. C. Hanhart | Supernova constraints on MeV dark sectors from e+ e- annihilations | PRD 89 (2014) 105015 | 1310.3826 |
71 | J. B. J. Blumlein | New exclusion limits for dark gauge forces from beam-dump data | PLB 701 (2011) 155 | 1104.2747 |
72 | R. Essig, R. Harnik, J. Kaplan, and N. Toro | Discovering new light states at neutrino experiments | PRD 82 (2010) 113008 | 1008.0636 |
73 | A. R. Brian Batell, Maxim Pospelov | Exploring portals to a hidden sector through fixed targets | PRD 80 (2009) 095024 | 0906.5614 |
74 | S. N. Gninenko | Constraints on sub-GeV hidden sector gauge bosons from a search for heavy neutrino decays | PLB 713 (2012) 244 | 1204.3583 |
75 | LHCb Collaboration | Search for dark photons produced in 13 TeV pp collisions | PRL 120 (2018) 061801 | 1710.02867 |
76 | B. Batell, M. Pospelov, and A. Ritz | Probing a secluded U(1) at B-factories | PRD 79 (2009) 115008 | 0903.0363 |
Compact Muon Solenoid LHC, CERN |