2019:groups:higgs:lightscalars
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2019:groups:higgs:lightscalars [2019/06/26 10:55] suzanne.gascon |
2019:groups:higgs:lightscalars [2019/06/27 15:58] jose.miguel.no |
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| Responsible: Grégory Moreau [TH](moreau@th.u-psud.fr), Susan Gascon-Shotkin [EXP](smgascon@mail.cern.ch) | Responsible: Grégory Moreau [TH](moreau@th.u-psud.fr), Susan Gascon-Shotkin [EXP](smgascon@mail.cern.ch) | ||
| - | Participants (please add your name and your email): Jérémie Quevillon (jeremie.quevillon@lpsc.in2p3.fr), Antoine Lesauvage (antoine.baptiste.lesauvage@cern.ch), Aoife Bharucha (aoife.bharucha@cpt.univ-mrs.fr), Bill Murray (bill.murray@cern.ch), Nishita Desai (nishita.desai@umontpellier.fr) Jose Miguel No (josemiguel.no@uam.es), Jon Butterworth (J.Butterworth@ucl.ac.uk), Natascia Vignaroli (vignaroli@pd.infn.it), Kohsaku Tobioka (ktobioka@fsu.edu), Giacomo Polesello (giacomo.polesello@cern.ch), Sophie Williamson (swilliamson@lpthe.jussieu.fr), Shilpi Jain(shilpi.jain@cern.ch), Shankha Banerjee (banerjeeshankha@gmail.com), Biplob Bhattacherjee(bbhattacherjee@gmail.com), José Zurita (jose.zurita@kit.edu), | + | Participants (please add your name and your email): Jérémie Quevillon (jeremie.quevillon@lpsc.in2p3.fr), Antoine Lesauvage (antoine.baptiste.lesauvage@cern.ch), Aoife Bharucha (aoife.bharucha@cpt.univ-mrs.fr), Bill Murray (bill.murray@cern.ch), Nishita Desai (nishita.desai@umontpellier.fr) Jose Miguel No (josemiguel.no@uam.es), Jon Butterworth (J.Butterworth@ucl.ac.uk), Natascia Vignaroli (vignaroli@pd.infn.it), Kohsaku Tobioka (ktobioka@fsu.edu), Giacomo Polesello (giacomo.polesello@cern.ch), Sophie Williamson (swilliamson@lpthe.jussieu.fr), Shilpi Jain(shilpi.jain@cern.ch), Shankha Banerjee (banerjeeshankha@gmail.com), Biplob Bhattacherjee(bbhattacherjee@gmail.com), José Zurita (jose.zurita@kit.edu), Thomas Flacke (flacke@ibs.re.kr) |
| => First MEETING Friday June 21 at 17:00pm in the QCD Room. | => First MEETING Friday June 21 at 17:00pm in the QCD Room. | ||
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| * ... | * ... | ||
| - | Promising DECAYS: $\phi\to\gamma\gamma$ (and $\mu\mu$, $bb$, $\tau\tau$, Missing E_T ?) | + | Promising DECAYS: $\phi\to\gamma\gamma$ (and $\mu\mu$, $bb$, $\tau\tau$, Missing E_T ?) [names: **TF**] |
| General comment: If the particle is lighter than hadronic threshold ($m_a <3m_\pi<450\rm MeV$ for CP-odd scalar), the particle is easily long-lived in the reasonable parameter space. Many literature ignores loop-factor $16\pi^2$, which sometimes leads to less physical parameter space. A scale $\Lambda/C_{\gamma\gamma}=1\rm TeV$ in [[https://arxiv.org/abs/1708.00443|1708.00443]] parameterization corresponds to a scale $f_a =6\rm GeV$ in the decay constant (SSB scale).So ALP being invisible is quite possible with sub-GeV mass and $f_a >100\rm GeV$. Estimates with ALP as missing energy in [[https://arxiv.org/abs/1409.4792|1409.4792]] (mono-jet), [[https://arxiv.org/abs/1701.05379|1701.05379]] (mono-W, mono-Z, mono-Higgs) and [[https://arxiv.org/abs/1901.03061|1901.03061]]. | General comment: If the particle is lighter than hadronic threshold ($m_a <3m_\pi<450\rm MeV$ for CP-odd scalar), the particle is easily long-lived in the reasonable parameter space. Many literature ignores loop-factor $16\pi^2$, which sometimes leads to less physical parameter space. A scale $\Lambda/C_{\gamma\gamma}=1\rm TeV$ in [[https://arxiv.org/abs/1708.00443|1708.00443]] parameterization corresponds to a scale $f_a =6\rm GeV$ in the decay constant (SSB scale).So ALP being invisible is quite possible with sub-GeV mass and $f_a >100\rm GeV$. Estimates with ALP as missing energy in [[https://arxiv.org/abs/1409.4792|1409.4792]] (mono-jet), [[https://arxiv.org/abs/1701.05379|1701.05379]] (mono-W, mono-Z, mono-Higgs) and [[https://arxiv.org/abs/1901.03061|1901.03061]]. | ||
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| {{ :2019:groups:higgs:alp-pr.tar.gz |ALP UFO file }} from [[https://arxiv.org/abs/1708.00443|Bauer, Neubert, Thamm]] with fix for the ALP mass / Higgs/ Z mass bug from Peter Richardson. | {{ :2019:groups:higgs:alp-pr.tar.gz |ALP UFO file }} from [[https://arxiv.org/abs/1708.00443|Bauer, Neubert, Thamm]] with fix for the ALP mass / Higgs/ Z mass bug from Peter Richardson. | ||
| - | {{ :2019:groups:higgs:alp_chiral_ufo_v2.tar.gz |ALP UFO file }} from [[https://arxiv.org/abs/1701.05379|Brivio, Gavela, Merlo, Mimasu, No, del Rey, Sanz]] (with fix for the ALP width). | + | {{ :2019:groups:higgs:alp_chiral_ufo_v2.tar.gz |ALP UFO file }} from [[https://arxiv.org/abs/1701.05379|1701.05379]] (Brivio, Gavela, Merlo, Mimasu, No, del Rey, Sanz) (with fix for the ALP width). |
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| {{ :2019:groups:higgs:alp_linear_ufo.tar.gz | ALP linear UFO file }} from [[https://arxiv.org/abs/1701.05379|Brivio, Gavela, Merlo, Mimasu, No, del Rey, Sanz]] (also with fix for the ALP width - GP). | {{ :2019:groups:higgs:alp_linear_ufo.tar.gz | ALP linear UFO file }} from [[https://arxiv.org/abs/1701.05379|Brivio, Gavela, Merlo, Mimasu, No, del Rey, Sanz]] (also with fix for the ALP width - GP). | ||
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| * Processes + models: | * Processes + models: | ||
| - | * h-->Zphi--->llgamma gamma (or mu+mu-, or tau+tau- with recast from h->aa->2mu2tau, CMS-PAS-HIG-15-011) | + | * h-->Zphi--->llgamma gamma (or mu+mu-, or tau+tau- with recast from h->aa->2mu2tau, CMS-PAS-HIG-15-011) [**BB, SJ, SB**] |
| * Z*-->Zphi-->llgamma or gammaphi-->3gamma | * Z*-->Zphi-->llgamma or gammaphi-->3gamma | ||
| * (Above 2 with 'Bauer et al.' model) | * (Above 2 with 'Bauer et al.' model) | ||
| - | * h*-->Zphi-->llgamma gamma (derive UFO rom h*-->ZZ* with add'l functionality?) | + | * h*-->Zphi-->llgamma gamma (derive UFO from h*-->ZZ* with add'l functionality?) [**SJ**] |
| * qqbar/e+e--->Z*/gamma*-->Zphi-->llgamma gamma (started LH 2017) | * qqbar/e+e--->Z*/gamma*-->Zphi-->llgamma gamma (started LH 2017) | ||
| * qqbar-->Z*/gamma*-->phi + 2j (VBF version of above) | * qqbar-->Z*/gamma*-->phi + 2j (VBF version of above) | ||
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| * tprime--tphi, phi-->gamma gamma (singlet pseudo-scalar, composite Higgs) | * tprime--tphi, phi-->gamma gamma (singlet pseudo-scalar, composite Higgs) | ||
| - | * Theoretical: recasting as 2HDM | + | * Theoretical: recasting as 2HDM and other benchmark models [**JQ**] |
| * Experimental: | * Experimental: | ||
| - | * 'fat' photons | + | * 'fat' photons [**SJ**] |
| - | *statistical tool to produce proto-limits after proto-selections | + | *statistical tool to produce proto-limits after proto-selections [**SJ**]: Such a tool is now ready. This uses likelihood ratio as a test statistic i.e. L(s+b)/L(b). Uses Cls method to quote the upper limits which is commonly and widely used by CMS and ATLAS. This has been cross-checked against the CMS limit tool for cut and counting experiment. But the present code can be extended to do a shape based limit. |
| Contributions on the above projects to the Friday closing talk (by the Higgs convenors) should include (~1-2 slides): | Contributions on the above projects to the Friday closing talk (by the Higgs convenors) should include (~1-2 slides): | ||
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| Please send to Gregory, Susan and Jose by Thursday morning (so we can give a synthesis to the speaker by ~Thursday noon and also circulate among us) | Please send to Gregory, Susan and Jose by Thursday morning (so we can give a synthesis to the speaker by ~Thursday noon and also circulate among us) | ||
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2019/groups/higgs/lightscalars.txt · Last modified: 2019/06/28 11:15 by suzanne.gascon
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