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Posts with #nullresult

#nullresult

Public posts on X that use #nullresult.

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  1. Patrick Koppenburg 🐧@PKoppenburg
    At @LHCbExperiment we do not have many null results - searches that do not find anything and thus set limits on the production rate of the searched for particle (or decay of a particle). Here's one example. #thread #XiccPuzzle #NullResult
    LHCb Physics @LHCbPhysics
    Search for the doubly charmed baryon Ξ⁺cc. - No significant signal is observed in the mass range from 3.4 to 3.8 GeV/c².
    139
  2. LHCb Physics@LHCbPhysics
    Search for the doubly charmed baryon Ξ⁺cc. - No significant signal is observed in the mass range from 3.4 to 3.8 GeV/c².
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    0312
  4. Freya Blekman@freyablekman
    #CMSpaper 1024: Is it possible for the Higgs boson to decay to a photon and an undetectable particle? Such a particle could be the Dark-matter connected sibling of the photon (called Dark Photon). This #nullresult is the first time such a search was done!
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    015
  5. Freya Blekman@freyablekman
    #CMSpaper 1024: Is it possible for the Higgs boson to decay to a photon and an undetectable particle? Such a particle could be the Dark-matter connected sibling of the photon (called Dark Photon). This #nullresult is the first time such a search was done!
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    2111
  6. Andreas Kotsadam@kotsadam
    Very proud of this paper that just came out! We delve into interethnic exposure in Hungarian schools where discrimination of Roma children is rampant. #soctwitter
    112559.5K
  7. Andreas Kotsadam@kotsadam
    @kotsadam
    In this pre-registered and large study (> 2000 students in 39 schools) we find that neither manipulating the closeness of interethnic exposure between students within classrooms nor variation in ethnic composition across grade levels affects antiminority discrimination.
    110513
  8. Andreas Kotsadam@kotsadam
    @kotsadam
    We speculate that the domains of contact and conflict theory are much narrower than previously thought as most positive findings are from settings with forced co-residence and most negative findings are from observational studies. #nullresult
    103193
  10. diogoverissimo.bsky.social@verissimodiogo
    NEW! Testing branding techniques on species common names to improve their fundraising profile for conservation Open Acess in @AnimalConserv ! 🧵1/5
    11321
  11. Freya Blekman@freyablekman
    #CMSPaper 1230: This paper searches for undetectable particles in signatures with quarks, gluons, Higgs bosons and photons. It's a #NullResult, but it is sensitive to #supersymmetry partners of the Higgs boson, W/Z boson (worlds best!) ... and graviton!
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    026973
  14. Freya Blekman@freyablekman
    #CMSpaper 993: New and SM Higgs bosons. Are there new Higgs bosons? This #nullresult looks for two identical new Higgs bosons that come from a Standard Model Higgs boson decay, looking for something very rare: Higgs bosons decaying to two muons or two taus
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    0211
  15. Freya Blekman@freyablekman
    #CMSPaper 1243: are there undiscovered particles that decay to two (undiscovered or like the one discovered in 2012) Higgs-like bosons? This paper searches for that signature. It is a #nullresult
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    0181K
  16. Freya Blekman@freyablekman
    #CMSpaper 910: boosted WW, WZ, or ZZ boson resonances to the next level. This #nullresult paper uses kinematic fits to the mass of the #standardmodel particles to gain a huge improvement in sensitivity compared to previous search methods
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    002
  17. Chris Frauenberger / @[email protected]@cfrauenberger
    New paper out about a large, long-term study on the impact of #AAL technologies on seniors, showing… nothing. We report a #NullResult and offer some critical methodological reflections on RCTs with technology.
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  18. Freya Blekman@freyablekman
    #CMSPaper 1206: scalar top quarks (aka squarks) are hypothetical particles from #supersymmetry. This #nullresult (we see even fewer collisions than expected!) searches for cases where those squarks create signatures with b/light quarks and missing energy.
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    016854
  19. Freya Blekman@freyablekman
    #CMSPaper 1243: are there undiscovered particles that decay to two (undiscovered or like the one discovered in 2012) Higgs-like bosons? This paper searches for that signature. It is a #nullresult
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    003456
  20. Freya Blekman@freyablekman
    #CMSpaper 974: Are there charged #higgs bosons? Do they decay to a top quark and a bottom quark? At high mass this would be the most obvious decay. This #nullresult searches for a resonance in the t+b mass spectrum using data collected in 2016
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    105
  21. Freya Blekman@freyablekman
    #CMSpaper 1038: Electrons and muons are made regularly in LHC collisions, but this #nullresult searches if there are some tiny amount extra due to supersymmetry, with a focus on collisions that look similar to when a Z boson is made, or even Z boson+SUSY?
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    002
  22. Freya Blekman@freyablekman
    #CMSPaper 1287 looks for undiscovered extra neutrinos, in signatures with many leptons (including taus, see plot, very few events). It is a #nullresult that sets very stringent bounds on heavy neutral leptons and majorana neutrinos
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    017519
  23. Freya Blekman@freyablekman
    #CMSPaper 1061: are there particles similar to a W boson but much more massive? This #nullresult examines the Run 2 dataset for a resonance signature of such a particle that decays into a top quark and a b quark, both decaying to jets. The paper:
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    005
  24. Patrick Koppenburg 🐧@PKoppenburg
    I study rare decays of particles containing b quarks, but it's also worth investigating decays of charmed particles. For instance "penguin" loops like this
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    308
  25. Patrick Koppenburg 🐧@PKoppenburg
    @PKoppenburg
    Which is the charm counterpart of those described in this (long) thread. But in charm these processes are even more rare.
    Patrick Koppenburg 🐧 @PKoppenburg
    A #thread on #penguins and why I like them.
    101
  27. Patrick Koppenburg 🐧@PKoppenburg
    @PKoppenburg
    Today @LHCbExperiment reports on 25 searches for very rare decays of mesons containing a charm quark. Nothing is found, but the new stringent limits constrain New Physics models that allow for such decays. #nullResult
    LHCb Physics @LHCbPhysics
    Searches for 25 rare and forbidden decays of D⁺ and Dₛ⁺ mesons - 90% confidence level limits on the branching fractions are set between 1.4×10⁻⁸ and 6.4×10⁻⁶. In most cases, these results represent an improvement by one to two orders of magnitude.
    001
  28. LHCb Physics@LHCbPhysics
    Searches for 25 rare and forbidden decays of D⁺ and Dₛ⁺ mesons - 90% confidence level limits on the branching fractions are set between 1.4×10⁻⁸ and 6.4×10⁻⁶. In most cases, these results represent an improvement by one to two orders of magnitude.
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    0111
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