Compact Muon Solenoid
LHC, CERN
Visit us: CMS Public Website, CMS Physics ;
Contact us: CMS Publications Committee
| CMS-PAS-EXO-23-010 | ||
| Search for nonresonant new physics in high-mass dilepton events in association with b-tagged jets | ||
| CMS Collaboration | ||
| 23 July 2024 | ||
| Abstract: A search for nonresonant new physics phenomena in high-mass dilepton events produced in association with b-tagged jets is performed using the data collected by the CMS experiment at the CERN LHC at a center-of-mass energy of 13 TeV. The analysis considers two EFT-based models with 6-dimensional operators involving four fermion contact interactions between two leptons (electrons and muons) and b or s quarks ($ \mathrm{bb\ell\ell} $ and $ \mathrm{bs\ell\ell} $). The analysis considers two lepton flavor combinations ($ \mathrm{ee} $ and $ \mu\mu $) and classifies events as having 0, 1, and $ \geq 2 \mathrm{b} $-tagged jets in the final state. No significant excess is observed over the smoothly falling standard model background. Upper limits on the product of production cross section and branching fraction of the new physics are set. These translate into lower limits on the energy scale $ \Lambda $ of 8.3 to 9.0 TeV in the $ \mathrm{bb\ell\ell} $ model, depending on model parameters, and on the ratio of energy scale and coupling $ \Lambda/g_{*} $ of 2.0 to 2.6 TeV in the $ \mathrm{bs\ell\ell} $ model. The latter represent the most stringent limits on this model to date. Lepton flavor universality is also tested by comparing the dielectron and dimuon mass spectra for different b-tagged jet multiplicities. | ||
| Links: CDS record (PDF) ; Physics Briefing ; CADI line (restricted) ; | ||
| Figures | |
png pdf |
Figure 1:
Representative Feynman diagrams for the production of dileptons via the $ \mathrm{b}\bar{\mathrm{b}}\ell^{+}\ell^{-} $ operator at the LHC, in association with 0 (left), 1 (center), and 2 (right) b quarks. |
png pdf |
Figure 2:
Representative Feynman diagrams for the production of dileptons via the $ \mathrm{b} \mathrm{s}\ell^{+}\ell^{-} $ operator at the LHC within the EFT approach. |
png |
Figure 2-a:
Representative Feynman diagrams for the production of dileptons via the $ \mathrm{b} \mathrm{s}\ell^{+}\ell^{-} $ operator at the LHC within the EFT approach. |
png |
Figure 2-b:
Representative Feynman diagrams for the production of dileptons via the $ \mathrm{b} \mathrm{s}\ell^{+}\ell^{-} $ operator at the LHC within the EFT approach. |
png pdf |
Figure 3:
Observed $ m_{\ell\ell} $ for the data, and the post-fit backgrounds (stacked histograms), in the signal region for $ \mathrm{e}\mathrm{e} $ + 0 b jet (left) and $ \mu\mu $ + 0 b jet (right) channels. The lower panels show ratios of the data to the pre-fit background prediction and post-fit background yield as red open squares and blue points, respectively. The dashed band in the lower panels indicates the systematic component of the post-fit uncertainty. The solid lines in the upper panel corresponds to the $ \mathrm{b}\mathrm{b}\ell\ell $ signal expectation, for $ \Lambda = $ 6 TeV and 18 TeV. |
png pdf |
Figure 3-a:
Observed $ m_{\ell\ell} $ for the data, and the post-fit backgrounds (stacked histograms), in the signal region for $ \mathrm{e}\mathrm{e} $ + 0 b jet (left) and $ \mu\mu $ + 0 b jet (right) channels. The lower panels show ratios of the data to the pre-fit background prediction and post-fit background yield as red open squares and blue points, respectively. The dashed band in the lower panels indicates the systematic component of the post-fit uncertainty. The solid lines in the upper panel corresponds to the $ \mathrm{b}\mathrm{b}\ell\ell $ signal expectation, for $ \Lambda = $ 6 TeV and 18 TeV. |
png pdf |
Figure 3-b:
Observed $ m_{\ell\ell} $ for the data, and the post-fit backgrounds (stacked histograms), in the signal region for $ \mathrm{e}\mathrm{e} $ + 0 b jet (left) and $ \mu\mu $ + 0 b jet (right) channels. The lower panels show ratios of the data to the pre-fit background prediction and post-fit background yield as red open squares and blue points, respectively. The dashed band in the lower panels indicates the systematic component of the post-fit uncertainty. The solid lines in the upper panel corresponds to the $ \mathrm{b}\mathrm{b}\ell\ell $ signal expectation, for $ \Lambda = $ 6 TeV and 18 TeV. |
png pdf |
Figure 4:
Observed $ m_{\ell\ell} $ for the data, and the post-fit backgrounds (stacked histograms), in the signal region for $ \mathrm{e}\mathrm{e} $ + 1 b jet (left) and $ \mu\mu $ + 1 b jet (right) channels. The lower panels show ratios of the data to the pre-fit background prediction and post-fit background yield as red open squares and blue points, respectively. The dashed band in the lower panels indicates the systematic component of the post-fit uncertainty. The solid lines in the upper panel corresponds to the $ \mathrm{b}\mathrm{b}\ell\ell $ signal expectation, for $ \Lambda = $ 6 TeV and 18 TeV. |
png pdf |
Figure 4-a:
Observed $ m_{\ell\ell} $ for the data, and the post-fit backgrounds (stacked histograms), in the signal region for $ \mathrm{e}\mathrm{e} $ + 1 b jet (left) and $ \mu\mu $ + 1 b jet (right) channels. The lower panels show ratios of the data to the pre-fit background prediction and post-fit background yield as red open squares and blue points, respectively. The dashed band in the lower panels indicates the systematic component of the post-fit uncertainty. The solid lines in the upper panel corresponds to the $ \mathrm{b}\mathrm{b}\ell\ell $ signal expectation, for $ \Lambda = $ 6 TeV and 18 TeV. |
png pdf |
Figure 4-b:
Observed $ m_{\ell\ell} $ for the data, and the post-fit backgrounds (stacked histograms), in the signal region for $ \mathrm{e}\mathrm{e} $ + 1 b jet (left) and $ \mu\mu $ + 1 b jet (right) channels. The lower panels show ratios of the data to the pre-fit background prediction and post-fit background yield as red open squares and blue points, respectively. The dashed band in the lower panels indicates the systematic component of the post-fit uncertainty. The solid lines in the upper panel corresponds to the $ \mathrm{b}\mathrm{b}\ell\ell $ signal expectation, for $ \Lambda = $ 6 TeV and 18 TeV. |
png pdf |
Figure 5:
Observed $ m_{\ell\ell} $ for the data, and the post-fit backgrounds (stacked histograms), in the signal region for $ \mathrm{e}\mathrm{e} $ + $ > $1 b jet (left) and $ \mu\mu $ + $ > $1 b jet (right) channels. The lower panels show ratios of the data to the pre-fit background prediction and post-fit background yield as red open squares and blue points, respectively. The dashed band in the lower panels indicates the systematic component of the post-fit uncertainty. The solid lines in the upper panel corresponds to the $ \mathrm{b}\mathrm{b}\ell\ell $ signal expectation, for $ \Lambda = $ 6 TeV and 18 TeV. |
png pdf |
Figure 5-a:
Observed $ m_{\ell\ell} $ for the data, and the post-fit backgrounds (stacked histograms), in the signal region for $ \mathrm{e}\mathrm{e} $ + $ > $1 b jet (left) and $ \mu\mu $ + $ > $1 b jet (right) channels. The lower panels show ratios of the data to the pre-fit background prediction and post-fit background yield as red open squares and blue points, respectively. The dashed band in the lower panels indicates the systematic component of the post-fit uncertainty. The solid lines in the upper panel corresponds to the $ \mathrm{b}\mathrm{b}\ell\ell $ signal expectation, for $ \Lambda = $ 6 TeV and 18 TeV. |
png pdf |
Figure 5-b:
Observed $ m_{\ell\ell} $ for the data, and the post-fit backgrounds (stacked histograms), in the signal region for $ \mathrm{e}\mathrm{e} $ + $ > $1 b jet (left) and $ \mu\mu $ + $ > $1 b jet (right) channels. The lower panels show ratios of the data to the pre-fit background prediction and post-fit background yield as red open squares and blue points, respectively. The dashed band in the lower panels indicates the systematic component of the post-fit uncertainty. The solid lines in the upper panel corresponds to the $ \mathrm{b}\mathrm{b}\ell\ell $ signal expectation, for $ \Lambda = $ 6 TeV and 18 TeV. |
png pdf |
Figure 6:
Ratio of the differential dilepton production cross section in the dimuon and dielectron channels as a function of dilepton mass in 0b final state (left) and 1b + 2b final state (right). The ratio is obtained after correcting the reconstructed mass spectra to particle level. The error bars include both statistical and systematic uncertainties. |
png pdf |
Figure 6-a:
Ratio of the differential dilepton production cross section in the dimuon and dielectron channels as a function of dilepton mass in 0b final state (left) and 1b + 2b final state (right). The ratio is obtained after correcting the reconstructed mass spectra to particle level. The error bars include both statistical and systematic uncertainties. |
png pdf |
Figure 6-b:
Ratio of the differential dilepton production cross section in the dimuon and dielectron channels as a function of dilepton mass in 0b final state (left) and 1b + 2b final state (right). The ratio is obtained after correcting the reconstructed mass spectra to particle level. The error bars include both statistical and systematic uncertainties. |
png pdf |
Figure 7:
Upper limits at 95% CL on the product of the production cross section and the branching fraction for $ \mathrm{b}\mathrm{b}\ell\ell $ signal with different chirality condition in $ \mathrm{e}\mathrm{e} $ channel with $ \geq $ 0 b-tagged jets. The shaded bands correspond to the 68 and 95% quantiles for the expected limits. The red line corresponds to the theoretical predictions for the $ \mathrm{b}\mathrm{b}\ell\ell $ signal. |
png pdf |
Figure 7-a:
Upper limits at 95% CL on the product of the production cross section and the branching fraction for $ \mathrm{b}\mathrm{b}\ell\ell $ signal with different chirality condition in $ \mathrm{e}\mathrm{e} $ channel with $ \geq $ 0 b-tagged jets. The shaded bands correspond to the 68 and 95% quantiles for the expected limits. The red line corresponds to the theoretical predictions for the $ \mathrm{b}\mathrm{b}\ell\ell $ signal. |
png pdf |
Figure 7-b:
Upper limits at 95% CL on the product of the production cross section and the branching fraction for $ \mathrm{b}\mathrm{b}\ell\ell $ signal with different chirality condition in $ \mathrm{e}\mathrm{e} $ channel with $ \geq $ 0 b-tagged jets. The shaded bands correspond to the 68 and 95% quantiles for the expected limits. The red line corresponds to the theoretical predictions for the $ \mathrm{b}\mathrm{b}\ell\ell $ signal. |
png pdf |
Figure 7-c:
Upper limits at 95% CL on the product of the production cross section and the branching fraction for $ \mathrm{b}\mathrm{b}\ell\ell $ signal with different chirality condition in $ \mathrm{e}\mathrm{e} $ channel with $ \geq $ 0 b-tagged jets. The shaded bands correspond to the 68 and 95% quantiles for the expected limits. The red line corresponds to the theoretical predictions for the $ \mathrm{b}\mathrm{b}\ell\ell $ signal. |
png pdf |
Figure 7-d:
Upper limits at 95% CL on the product of the production cross section and the branching fraction for $ \mathrm{b}\mathrm{b}\ell\ell $ signal with different chirality condition in $ \mathrm{e}\mathrm{e} $ channel with $ \geq $ 0 b-tagged jets. The shaded bands correspond to the 68 and 95% quantiles for the expected limits. The red line corresponds to the theoretical predictions for the $ \mathrm{b}\mathrm{b}\ell\ell $ signal. |
png pdf |
Figure 8:
Upper limits at 95% CL on the product of the production cross section and the branching fraction for $ \mathrm{b}\mathrm{b}\ell\ell $ signal with different chirality condition in $ \mu\mu $ channel with $ \geq $ 0 b-tagged jets. The shaded bands correspond to the 68 and 95% quantiles for the expected limits. The red line corresponds to the theoretical predictions for the $ \mathrm{b}\mathrm{b}\ell\ell $ signal. |
png pdf |
Figure 8-a:
Upper limits at 95% CL on the product of the production cross section and the branching fraction for $ \mathrm{b}\mathrm{b}\ell\ell $ signal with different chirality condition in $ \mu\mu $ channel with $ \geq $ 0 b-tagged jets. The shaded bands correspond to the 68 and 95% quantiles for the expected limits. The red line corresponds to the theoretical predictions for the $ \mathrm{b}\mathrm{b}\ell\ell $ signal. |
png pdf |
Figure 8-b:
Upper limits at 95% CL on the product of the production cross section and the branching fraction for $ \mathrm{b}\mathrm{b}\ell\ell $ signal with different chirality condition in $ \mu\mu $ channel with $ \geq $ 0 b-tagged jets. The shaded bands correspond to the 68 and 95% quantiles for the expected limits. The red line corresponds to the theoretical predictions for the $ \mathrm{b}\mathrm{b}\ell\ell $ signal. |
png pdf |
Figure 8-c:
Upper limits at 95% CL on the product of the production cross section and the branching fraction for $ \mathrm{b}\mathrm{b}\ell\ell $ signal with different chirality condition in $ \mu\mu $ channel with $ \geq $ 0 b-tagged jets. The shaded bands correspond to the 68 and 95% quantiles for the expected limits. The red line corresponds to the theoretical predictions for the $ \mathrm{b}\mathrm{b}\ell\ell $ signal. |
png pdf |
Figure 8-d:
Upper limits at 95% CL on the product of the production cross section and the branching fraction for $ \mathrm{b}\mathrm{b}\ell\ell $ signal with different chirality condition in $ \mu\mu $ channel with $ \geq $ 0 b-tagged jets. The shaded bands correspond to the 68 and 95% quantiles for the expected limits. The red line corresponds to the theoretical predictions for the $ \mathrm{b}\mathrm{b}\ell\ell $ signal. |
png pdf |
Figure 9:
Upper limits at 95% CL on the product of the production cross section and the branching fraction for $ \mathrm{b}\mathrm{s}\ell\ell $ signal in $ \mathrm{e}\mathrm{e} $ channel (left) and $ \mu\mu $ channel (right) with 0 b-tagged jets. The shaded bands correspond to the 68 and 95% quantiles for the expected limits. The red line corresponds to the theoretical predictions for the $ \mathrm{b}\mathrm{s}\ell\ell $ signal. |
png pdf |
Figure 9-a:
Upper limits at 95% CL on the product of the production cross section and the branching fraction for $ \mathrm{b}\mathrm{s}\ell\ell $ signal in $ \mathrm{e}\mathrm{e} $ channel (left) and $ \mu\mu $ channel (right) with 0 b-tagged jets. The shaded bands correspond to the 68 and 95% quantiles for the expected limits. The red line corresponds to the theoretical predictions for the $ \mathrm{b}\mathrm{s}\ell\ell $ signal. |
png pdf |
Figure 9-b:
Upper limits at 95% CL on the product of the production cross section and the branching fraction for $ \mathrm{b}\mathrm{s}\ell\ell $ signal in $ \mathrm{e}\mathrm{e} $ channel (left) and $ \mu\mu $ channel (right) with 0 b-tagged jets. The shaded bands correspond to the 68 and 95% quantiles for the expected limits. The red line corresponds to the theoretical predictions for the $ \mathrm{b}\mathrm{s}\ell\ell $ signal. |
png pdf |
Figure 10:
Upper limits at 95% CL on the product of the production cross section and the branching fraction for $ \mathrm{b}\mathrm{s}\ell\ell $ signal in $ \mathrm{e}\mathrm{e} $ channel (left) and $ \mu\mu $ channel (right) with 1 b-tagged jets. The shaded bands correspond to the 68 and 95% quantiles for the expected limits. The red line corresponds to the theoretical predictions for the $ \mathrm{b}\mathrm{s}\ell\ell $ signal. |
png pdf |
Figure 10-a:
Upper limits at 95% CL on the product of the production cross section and the branching fraction for $ \mathrm{b}\mathrm{s}\ell\ell $ signal in $ \mathrm{e}\mathrm{e} $ channel (left) and $ \mu\mu $ channel (right) with 1 b-tagged jets. The shaded bands correspond to the 68 and 95% quantiles for the expected limits. The red line corresponds to the theoretical predictions for the $ \mathrm{b}\mathrm{s}\ell\ell $ signal. |
png pdf |
Figure 10-b:
Upper limits at 95% CL on the product of the production cross section and the branching fraction for $ \mathrm{b}\mathrm{s}\ell\ell $ signal in $ \mathrm{e}\mathrm{e} $ channel (left) and $ \mu\mu $ channel (right) with 1 b-tagged jets. The shaded bands correspond to the 68 and 95% quantiles for the expected limits. The red line corresponds to the theoretical predictions for the $ \mathrm{b}\mathrm{s}\ell\ell $ signal. |
| Tables | |
png pdf |
Table 1:
Overview of the signal and control regions. |
png pdf |
Table 2:
Measured $ SF_{t\bar{t}} $ in OS $ \mathrm{e}\mu $ control region for BB region. The errors are statistical uncertainty in data and MC yields. |
png pdf |
Table 3:
Measured $ SF_{t\bar{t}} $ in OS $ \mathrm{e}\mu $ control region for BE region. The errors are statistical uncertainty in data and MC yields. |
png pdf |
Table 4:
Observed scale factor and corresponding uncertainty in the $ Z $ boson control region for BB region in $ \mathrm{e}\mathrm{e} $ channel. |
png pdf |
Table 5:
Observed scale factor and corresponding uncertainty in the $ Z $ boson control region for BE region in $ \mathrm{e}\mathrm{e} $ channel. |
png pdf |
Table 6:
Observed scale factor and corresponding uncertainty in the $ Z $ boson control region for BB region in $ \mu\mu $ channel. |
png pdf |
Table 7:
Observed scale factor and corresponding uncertainty in the $ Z $ boson control region for BE region in $ \mu\mu $ channel. |
png pdf |
Table 8:
Scale of different systematic uncertainties for DY+jets background in the last two mass bins for $ \mathrm{e}\mathrm{e} $ channel. |
png pdf |
Table 9:
Scale of different systematic uncertainties for DY+jets background in the last two mass bins for $ \mu\mu $ channel. |
png pdf |
Table 10:
Event yields for $ \mathrm{e}\mathrm{e} $ channel in 0b final state. The uncertainties given with the yields include both statistical and systematic contributions. |
png pdf |
Table 11:
Event yields for $ \mathrm{e}\mathrm{e} $ channel in 1b final state. The uncertainties given with the yields include both statistical and systematic contributions. |
png pdf |
Table 12:
Event yields for $ \mathrm{e}\mathrm{e} $ channel in 2b final state. The uncertainties given with the yields include both statistical and systematic contributions. |
png pdf |
Table 13:
Event yields for $ \mu\mu $ channel in 0b final state. The uncertainties given with the yields include both statistical and systematic contributions. |
png pdf |
Table 14:
Event yields for $ \mu\mu $ channel in 1b final state. The uncertainties given with the yields include both statistical and systematic contributions. |
png pdf |
Table 15:
Event yields for $ \mu\mu $ channel in 2b final state. The uncertainties given with the yields include both statistical and systematic contributions. |
png pdf |
Table 16:
Lower limits at 95% CL on the energy scale $ \Lambda $ in the $ \mathrm{b}\mathrm{b}\ell\ell $ signal model in TeV for constructive left-left (ConLL), left-right (ConLR), right-left (ConRL), and right-right (ConRR) chirality structures in the dielectron and dimuon channels and the combination of the two. |
png pdf |
Table 17:
Lower limits at 95% CL on $ \Lambda/g_{*} $ in the $ \mathrm{b}\mathrm{s}\ell\ell $ signal model in TeV for 0 b channel. Shown are the expected and observed limits in the dielectron and dimuon channels and the combination of the two. |
png pdf |
Table 18:
Lower limits at 95% CL on $ \Lambda/g_{*} $ in the $ \mathrm{b}\mathrm{s}\ell\ell $ signal model in TeV for 1 b channel. Shown are the expected and observed limits in the dielectron and dimuon channels and the combination of the two. |
png pdf |
Table 19:
Lower limits at 95% CL on $ \Lambda/g_{*} $ in the $ \mathrm{b}\mathrm{s}\ell\ell $ signal model in TeV for combined (0b+1b) channel. Shown are the expected and observed limits in the dielectron and dimuon channels and the combination of the two. |
| Summary |
| A search for new physics in the high mass dilepton final state produced in association with b-jets has been performed, focusing on nonresonant phenomena. Two models of nonresonant signatures have been considered. In case of a four-fermion contact interaction in $ \mathrm{b}\mathrm{b}\ell\ell $ production, lower limits on the scale of new physics ($ \Lambda $) range are set depending on the helicity structure of the interaction and the sign of its interference with the SM DY background. The observed limit is found to be around 8.3--9.0 TeV for the $ \mathrm{b}\mathrm{b}\ell\ell $ signal based on different chirality conditions. In the $ \mathrm{b}\mathrm{s}\ell\ell $ model, lower limits on the ratio of the energy scale of new physics to the coupling ($ \Lambda/g_{*} $) are set ranging from 1.9 to 2.2 TeV depending on the channel and 2.4 TeV for the combination of all the channels, using all data collected during the Run 2 data taking period. The limits on the $ \mathrm{b}\mathrm{s}\ell\ell $ model are the most stringent to date. Besides this, the dielectron and dimuon invariant mass spectra are corrected for the detector effects and, are compared at the TeV scale. No significant deviation in the lepton flavor ratio from the SM expectation is observed. |
| References | ||||
| 1 | CMS Collaboration | Search for resonant and nonresonant new phenomena in high-mass dilepton final states at $ \sqrt{s} = $ 13 TeV | JHEP 07 (2021) 208 | CMS-EXO-19-019 2103.02708 |
| 2 | ATLAS Collaboration | Search for high-mass dilepton resonances using 139 fb$ ^{-1} $ of $ pp $ collision data collected at $ \sqrt{s} = $ 13 TeV with the ATLAS detector | PLB 796 (2019) 68 | 1903.06248 |
| 3 | ATLAS Collaboration | Search for new non-resonant phenomena in high-mass dilepton final states with the ATLAS detector | JHEP 11 (2020) 005 | 2006.12946 |
| 4 | ATLAS Collaboration | Search for New Phenomena in Final States with Two Leptons and One or No $ b $-Tagged Jets at $ \sqrt{s} = $ 13 TeV Using the ATLAS Detector | PRL 127 (2021) 141801 | 2105.13847 |
| 5 | CMS Collaboration | Search for a high-mass dimuon resonance produced in association with b quark jets at $ \sqrt{s} = $ 13 TeV | JHEP 10 (2023) 043 | CMS-EXO-22-016 2307.08708 |
| 6 | CMS Collaboration | Search for lepton flavour universality violation via production of a new neutral gauge boson decaying to two muons with one or two b-jets in pp collisions at $ \sqrt{s}= $ 13 TeV | technical report, CERN, Geneva, 2024 CDS |
|
| 7 | J. Albrecht, D. van Dyk, and C. Langenbruch | Flavour anomalies in heavy quark decays | Prog. Part. Nucl. Phys. 120 (2021) 103885 | 2107.04822 |
| 8 | LHCb Collaboration | Measurement of lepton universality parameters in $ B^+\to K^+\ell^+\ell^- $ and $ B^0\to K^{*0}\ell^+\ell^- $ decays | PRD 108 (2023) 032002 | 2212.09153 |
| 9 | M. Abdullah et al. | Probing a simplified $ {W}^{'} $ model of $ r({D}^{(*)}) $ anomalies using $ b $ tags, $ \tau $ leptons, and missing energy | PRD 98 (2018) 055016 | 1805.01869 |
| 10 | B. Allanach | LHC di-lepton searches for $ Z^\prime $ bosons which explain measurements of $ b \rightarrow s l^+l^- $ transitions | 2404.14748 | |
| 11 | Y. Afik, S. Bar-Shalom, J. Cohen, and Y. Rozen | Searching for New Physics with $ b\bar{b} \ell^+ \ell^- $ contact interactions | PLB 807 (2020) 135541 | 1912.00425 |
| 12 | S. Bar-Shalom, J. Cohen, A. Soni, and J. Wudka | Phenomenology of TeV-scale scalar Leptoquarks in the EFT | PRD 100 (2019) 055020 | 1812.03178 |
| 13 | M. Kramer, T. Plehn, M. Spira, and P. M. Zerwas | Pair production of scalar leptoquarks at the CERN LHC | PRD 71 (2005) 057503 | hep-ph/0411038 |
| 14 | I. Dorsner, S. Fajfer, and A. Greljo | Cornering Scalar Leptoquarks at LHC | JHEP 10 (2014) 154 | 1406.4831 |
| 15 | I. Doršner and A. Greljo | Leptoquark toolbox for precision collider studies | JHEP 05 (2018) 126 | 1801.07641 |
| 16 | Y. Afik et al. | Establishing a Search for $ b \rightarrow s \ell^{+} \ell^{-} $ Anomalies at the LHC | JHEP 08 (2018) 056 | 1805.11402 |
| 17 | S. Patnaik and R. Singh | A Light Shed on Lepton Flavor Universality in B Decays | Universe 9 (2023) 129 | 2211.04348 |
| 18 | B. Gripaios, M. Nardecchia, and S. A. Renner | Composite leptoquarks and anomalies in $ B $-meson decays | JHEP 05 (2015) 006 | 1412.1791 |
| 19 | CMS Collaboration | Performance of the CMS Level-1 trigger in proton-proton collisions at $ \sqrt{s} = $ 13 TeV | JINST 15 (2020) P10017 | CMS-TRG-17-001 2006.10165 |
| 20 | CMS Collaboration | The CMS trigger system | JINST 12 (2017) P01020 | CMS-TRG-12-001 1609.02366 |
| 21 | CMS Collaboration | The CMS experiment at the CERN LHC | JINST 3 (2008) S08004 | |
| 22 | J. Alwall et al. | The automated computation of tree-level and next-to-leading order differential cross sections and their matching to parton shower simulations | JHEP 07 (2014) 079 | 1405.0301 |
| 23 | R. Frederix and S. Frixione | Merging meets matching in MC@NLO | JHEP 12 (2012) 061 | 1209.6215 |
| 24 | S. Alioli, P. Nason, C. Oleari, and E. Re | A general framework for implementing NLO calculations in shower Monte Carlo programs: the POWHEG BOX | JHEP 06 (2010) 043 | 1002.2581 |
| 25 | C. Degrande et al. | UFO - The Universal FeynRules Output | Comput. Phys. Commun. 183 (2012) 1201 | 1108.2040 |
| 26 | J. Alwall et al. | Comparative study of various algorithms for the merging of parton showers and matrix elements in hadronic collisions | EPJC 53 (2008) 473 | 0706.2569 |
| 27 | T. Sjöstrand et al. | An introduction to PYTHIA 8.2 | Comput. Phys. Commun. 191 (2015) 159 | 1410.3012 |
| 28 | CMS Collaboration | Extraction and validation of a new set of CMS PYTHIA8 tunes from underlying-event measurements | EPJC 80 (2020) 4 | CMS-GEN-17-001 1903.12179 |
| 29 | NNPDF Collaboration | Parton distributions from high-precision collider data | EPJC 77 (2017) 663 | 1706.00428 |
| 30 | GEANT4 Collaboration | GEANT 4---a simulation toolkit | NIM A 506 (2003) 250 | |
| 31 | CMS Collaboration | Particle-flow reconstruction and global event description with the CMS detector | JINST 12 (2017) P10003 | CMS-PRF-14-001 1706.04965 |
| 32 | CMS Collaboration | Technical proposal for the Phase-II upgrade of the Compact Muon Solenoid | CMS Technical Proposal CERN-LHCC-2015-010, CMS-TDR-15-02, 2015 CDS |
|
| 33 | CMS Collaboration | Electron and photon reconstruction and identification with the CMS experiment at the CERN LHC | JINST 16 (2021) P05014 | CMS-EGM-17-001 2012.06888 |
| 34 | CMS Collaboration | Performance of the CMS muon trigger system in proton-proton collisions at $ \sqrt{s} = $ 13 TeV | JINST 16 (2021) P07001 | CMS-MUO-19-001 2102.04790 |
| 35 | CMS Collaboration | Performance of the reconstruction and identification of high-momentum muons in proton-proton collisions at $ \sqrt{s} = $ 13 TeV | JINST 15 (2020) P02027 | CMS-MUO-17-001 1912.03516 |
| 36 | M. Cacciari, G. P. Salam, and G. Soyez | The anti-$ k_{\mathrm{T}} $ jet clustering algorithm | JHEP 04 (2008) 063 | 0802.1189 |
| 37 | M. Cacciari, G. P. Salam, and G. Soyez | Fastjet user manual | EPJC 72 (2012) 1896 | 1111.6097 |
| 38 | CMS Collaboration | Pileup mitigation at CMS in 13 TeV data | JINST 15 (2020) P09018 | CMS-JME-18-001 2003.00503 |
| 39 | E. Bols et al. | Jet flavour classification using DeepJet | JINST 15 (2020) P12012 | 2008.10519 |
| 40 | CMS Collaboration | Performance summary of AK4 jet b tagging with data from proton-proton collisions at 13 TeV with the CMS detector | CMS Detector Performance Note CMS-DP-2023-005, 2023 CDS |
|
| 41 | CMS Collaboration | Performance of missing transverse momentum reconstruction in proton-proton collisions at $ \sqrt{s} = $ 13 TeV using the CMS detector | JINST 14 (2019) P07004 | CMS-JME-17-001 1903.06078 |
| 42 | CMS Collaboration | Search for physics beyond the standard model in dilepton mass spectra in proton-proton collisions at $ \sqrt{s}= $ 8 TeV | JHEP 04 (2015) 025 | CMS-EXO-12-061 1412.6302 |
| 43 | S. Schmitt | TUnfold: an algorithm for correcting migration effects in high energy physics | JINST 7 (2012) T10003 | 1205.6201 |
| 44 | CMS Collaboration | Precision luminosity measurement in proton-proton collisions at $ \sqrt{s} = $ 13 TeV in 2015 and 2016 at CMS | EPJC 81 (2021) 800 | CMS-LUM-17-003 2104.01927 |
| 45 | CMS Collaboration | CMS luminosity measurement for the 2017 data-taking period at $ \sqrt{s} = $ 13 TeV | CMS Physics Analysis Summary, 2018 link |
CMS-PAS-LUM-17-004 |
| 46 | CMS Collaboration | CMS luminosity measurement for the 2018 data-taking period at $ \sqrt{s} = $ 13 TeV | CMS Physics Analysis Summary, 2019 CMS-PAS-LUM-18-002 |
CMS-PAS-LUM-18-002 |
| 47 | CMS Collaboration | Measurement of the inelastic proton-proton cross section at $ \sqrt{s}= $ 13 TeV | JHEP 07 (2018) 161 | CMS-FSQ-15-005 1802.02613 |
| 48 | J. Butterworth et al. | PDF4LHC recommendations for LHC Run II | JPG 43 (2016) 023001 | 1510.03865 |
| 49 | CMS Collaboration | The CMS statistical analysis and combination tool: Combine | Accepted by Comput. Softw. Big Sci, 2024 | CMS-CAT-23-001 2404.06614 |
|
|
Compact Muon Solenoid LHC, CERN |
|
|
|
|
|
|