Physics beyond the Standard Model in light of the CDF W boson mass anomaly
Friday, June 24, 2022 
11:00 AM
Monday, June 20, 2022
Tuesday, June 21, 2022
Wednesday, June 22, 2022
Thursday, June 23, 2022
Friday, June 24, 2022
11:00 AM
How to measure the W Mass: A Theory Perspective

Joshua Isaacson
(
Fermi National Accelerator Laboratory
)
How to measure the W Mass: A Theory Perspective
Joshua Isaacson
(
Fermi National Accelerator Laboratory
)
11:00 AM  12:00 PM
Room: 8101 in building 8
12:00 PM
lunch
lunch
12:00 PM  1:00 PM
1:00 PM
2HDM in light of the CDF W boson mass and the muon anomalous magnetic moment

Jeonghyeon Song
(
Konkuk University
)
2HDM in light of the CDF W boson mass and the muon anomalous magnetic moment
Jeonghyeon Song
(
Konkuk University
)
1:00 PM  1:40 PM
Room: 8101 in building 8
The recent W boson mass measurement by the CDF collaboration with unprecedented precision indicates a significant deviation from the standard model prediction. This has profound consequences in searching for physics beyond the SM. In the framework of twoHiggsdoublet models, we study the effect of the new W mass measurement on the parameter space. We impose other constraints, including theoretical requirements, flavorchanging neutral currents in physics, the cutoff scale above 1 TeV, Higgs precision data, and direct collider search limits from the LEP, Tevatron, and LHC experiments. We find that upper bounds exist on the masses of the heavy Higgs bosons. And typeII and typeY in the inverted scenario are completely excluded. Simultaneous explanation including the muon g2 and lepton flavor universality data is also discussed in the Higgsphobic typeX.
1:40 PM
Correlating the W Mass with Higgs Couplings

Sungwoo Hong
(
Chicago and ANL
)
Correlating the W Mass with Higgs Couplings
Sungwoo Hong
(
Chicago and ANL
)
1:40 PM  2:20 PM
Room: 8101 in building 8
The recent updated measurements of W and Z masses by CDFII collaboration, if correct, suggest that there may exist new physics at around 6 TeV if new physics effects come from treelevel physics or at around a few 100 GeV if they are loopinduced effects. The majority of BSM models seem to generate required S and T dimension6 operators at looplevel, thereby rendering a couple of 100 GeV as a new target for BSM searches. In this talk, I discuss a rather generic correlation between the shift in W mass and Higgs couplings. For this, we note that Higgsdigluon and Higgsdiphoton couplings within the SM are oneloop induced, dominantly by the toploop for the former and Wloop for the latter. New physics within the Higgs sector with mass scale a few 100 GeV (needed to make a significant shift in W mass) is then expected to make corrections to these SM couplings. Given that both are loopinduced with not so large scale separation, one should then expect these effects are rather significant, either imposing nontrivial constraints already or large enough size testable in the near future.
2:20 PM
coffee
coffee
2:20 PM  2:40 PM
2:40 PM
CDF W mass anomaly from a dark sector with a StueckelbergHiggs portal

Zuowei Liu
(
Nanjing University
)
CDF W mass anomaly from a dark sector with a StueckelbergHiggs portal
Zuowei Liu
(
Nanjing University
)
2:40 PM  3:20 PM
Room: 8101 in building 8
We propose an explanation to the new W mass measurement recently reported by the CDF collaboration, which is larger than the standard model expectation by about 7 standard deviations. To alleviate the tensions that are imposed on the electroweak sector by the new W mass measurement, we carry out an analysis in the Stueckelberg extended standard model where a new neutral gauge boson appears which mixes with the two neutral gauge bosons in the electroweak sector both via the Stueckelberg mass terms and via the gauge invariant StueckelbergHiggs portal interaction and spoils the custodial symmetry at the tree level so that the simple relation between the W boson mass and the Z boson mass does not hold. We find that such an extension increases the W boson mass if the new gauge boson mass is larger than the Z boson mass. We further show that there exists a significant part of the parameter space in the extended model which includes the CDF mass anomaly and is consistent with the various observables at the Z pole and consistent with the ATLAS dilepton limits. The Stueckelberg Zprime boson, which resolves the CDF W mass anomaly, should be searchable in future LHC experiments.
3:20 PM
Running away from the Tparameter solution to the W mass anomaly

Rick Gupta
(
Tata Institute of Fundamental Research
)
Running away from the Tparameter solution to the W mass anomaly
Rick Gupta
(
Tata Institute of Fundamental Research
)
3:20 PM  4:00 PM
Room: 8101 in building 8
We show that it is essential to include renormalisation group (RG) effects for determining the SMEFT parameter space consistent with the CDF Wmass anomaly at the matching scale. We RG evolve the low energy SMEFT parameter space consistent with the anomaly to the matching scale and find a much larger allowed region. In particular we find that it is possible to have a vanishing or even negative T parameter at the matching scale. This will hopefully lead to a larger set of UV completions that can explain the anomaly. This effect is possible because operators that are only weakly constrained—for instance those probed by diboson and Higgs data—can have a contribution to the Wboson mass via oneloop RG effects, that is comparable to the treelevel contribution of strongly constrained operators related to electroweak precision observables. For these oneloop contributions to be important a relatively low new physics scale around 800 GeV is required. This enhances the possibility of probing this new physics in direct and indirect searches in the recent future.
4:00 PM
WBoson Mass, SMEFT and Future Tests at e⁺e⁻ Collider

Tao Liu
(
Hong Kong University of Science and Technology
)
WBoson Mass, SMEFT and Future Tests at e⁺e⁻ Collider
Tao Liu
(
Hong Kong University of Science and Technology
)
4:00 PM  4:40 PM
Room: 8101 in building 8
Recently the CDF collaboration reported a significant discrepancy between the direct measurement of the Wboson mass and its Standard Model (SM) prediction based on electroweak precision tests. In this talk we will present an SMEFT interpretation on this observation and discuss its implications for beyondtheSM physics and tests at future e⁺e⁻ collider.
4:40 PM
coffee
coffee
4:40 PM  5:00 PM
5:00 PM
SMEFT Analysis of the W boson mass in light of the recent CDF measurement

Emanuele Angelo Bagnaschi
(
CERN
)
SMEFT Analysis of the W boson mass in light of the recent CDF measurement
Emanuele Angelo Bagnaschi
(
CERN
)
5:00 PM  5:40 PM
Room: 8101 in building 8
We use the Fitmaker tool to incorporate the recent CDF measurement of mW in a global fit to electroweak, Higgs, and diboson data in the Standard Model Effective Field Theory (SMEFT) including dimension6 operators at linear order. We find that including any one of the SMEFT operators OHWB, OHD, Oℓℓ or O(3)Hℓ with a nonzero coefficient could provide a better fit than the Standard Model, with the strongest pull for OHD and no tension with other electroweak precision data. We then analyse which treelevel singlefield extensions of the Standard Model could generate such operator coefficients with the appropriate sign, and discuss the masses and couplings of these fields that best fit the CDF measurement and other data. In particular, the global fit favours either a singlet Z′ vector boson, a scalar electroweak triplet with zero hypercharge, or a vector electroweak triplet with unit hypercharge, followed by a singlet heavy neutral lepton, all with masses in the multiTeV range for unit coupling.
5:40 PM
SM and BSM predictions of Mᴡ using different renormalization schemes—FlexibleSUSY implementation and the example of the MRSSM

Dominik Stöckinger
(
Technische Universität Dresden
)
SM and BSM predictions of Mᴡ using different renormalization schemes—FlexibleSUSY implementation and the example of the MRSSM
Dominik Stöckinger
(
Technische Universität Dresden
)
5:40 PM  6:20 PM
Room: 8101 in building 8
Loop computations of Mᴡ in BSM scenarios can be done using different renormalization schemes such as onshell, MSbar, or mixed schemes. We discuss the differences, pros and cons, and point out the possibility of numerically large fake effects. The current implementation in the program FlexibleSUSY avoids such effects and allows to compute Mᴡ in a wide range of BSM scenarios. As an example we mention the MRSSM (Rsymmetric supersymmetric standard model), which leads to treelevel and oneloop contributions to Mᴡ and allows to accommodate the recent CDF measurement of Mᴡ.
6:20 PM
dinner
dinner
6:20 PM  7:30 PM