wiki:TwistedPheno

Twisted 2HDM Phenomenology

Signal with $h0\rightarrow A0 A0$

See the LightPseudo topic.

Signal with $H0\rightarrow Z A0$

Process $gg\rightarrow h0\rightarrow H0 H0 \rightarrow Z A0 Z A0 \rightarrow l+ l- l+ l- bbbb$

Signal (BP1, only eta<2.5 for b's), xsec before Z decays 463fb (already rescaled to best NLO with 1121/388!!!)

Backgrounds:

Hopeless because too low pt ? Discuss how to group b jets, give xsec of main bkgrd ZZbb (0.3 fb with loose cuts on b's)

Plots : delta R (also BP2), pT 3rd and 4th jets (also for BP2), ptb34_zaza_bp1_bp2.eps

Signal (BP2, only eta<2.5 for b's), xsec before Z decays 314fb (already rescaled to best NLO with 802/120!!!)

If additional cuts on b's (pt>15,eta<2.5 and dR>0.4), cross section is 157,7fb.

Backgrounds (two b-tags)

  • ZZbbbb to come euhhhh... 40ab!
  • ZZbbjj to come, not feasable with ME... BUT: ZZbbj is 30fb (pt>15,eta<2.5 and dR>0.4 on all jets), so ZZbbjj is probably negligible.

Plots: mH0's and mh0 (from Arnaud's thesis)

Process $gg\rightarrow bb H0\rightarrow bb Z A0 \rightarrow l+ l- bbbb$

Signal (BP3, no pT, eta cuts on b's, pt>10, eta<2.5 and dR>0.4 for leptons)

Backgrounds (one b-tag)

  • Zj to come -> hopeless
  • Zb
  • Zbb (where b's are closed together)

Plot: delta R (to show that b's are colinear)

Process $gg\rightarrow bb H0\rightarrow bb Z A0 \rightarrow l+ l- \tau\tau bb$ with taus in leptons

Signal (BP3, pT cuts on all leptons pt>20, eta<2.5)

Backgrounds (one inclusive sample), same cuts as signal, l+l- forced from Z

  • l+l- tau+ tau-
  • l+l- l+l-
Plots: inv mass and delta R for leptons with
m_inv-mZ bigger, mH

Signal with $H\pm\rightarrow W\pm A0$

Process $gg\rightarrow h0\rightarrow H+ H- \rightarrow W+ A0 W- A0 \rightarrow l+ \nu_l jj \tau+\tau-bb$

Signal (BP1, WARNING no cuts at all), xsec before W decays 304fb (already rescaled to best NLO with 1121/388!!!)

Background

  • ttl+l- (104fb with only a cut of 5 GeV for m_ll, to avoid gamma divergence)
  • LHE events, Root events ttl+l- (l incl tau), with t going to (w+>jj)b and tx going to (w->l-vl)b (l=e,mu), tau's decayed to e, mu (50k, 10.5fb)
  • LHE events, Root events ttl+l- (l incl tau), with t going to (w+>lvl)b (l=e,mu) and tx going to (w->jj)b, tau's decayed to e, mu (50k,10.5fb)
  • wl+l-jj, l includes tau's, (pt>20 for jets, >10 for leptons, eta jets & leptons < 2.5, dR for jj, jl and ll >0.4), w is going to e or mu
  • LHE events, Root events for l=tau, with tau decay into leptons (100k, xsec=8.2fb)
  • LHE events, Root events for l=e,mu (100k, xsec=127fb)
  • Same as previous, but w/o pt>10 and mll>5 instead (only e and mu) : LHE events, Root events for l=e,mu (20k, xsec=157fb)

Process $pp\rightarrow tH\pm (b) \rightarrow W- b W+ A0 (b) \rightarrow W+ W- b\tau+\tau-(b) \rightarrow jj l\pm \nu_l \tau+\tau-b(b)$

Signal (BP3, no cut at all), xsec total before w and tau decay 641 fb (no cuts on w decay products)

Background

Regarding the presence of at least on taggable b-jet, main bkg is ttl+l-, see WAWA

Process $gg\rightarrow tt \rightarrow W\pm H\mp bb \rightarrow W+ W- A0 bb \rightarrow W+ W- \tau\tau bb \rightarrow jj l\pm \nu_l \tau\tau bb$

Signal (BP1, no cut at all), xsec total before w+ and tau's decay 631 fb

Background is ttll, see WAWA

Hopeless signals with $A0\trightarrow bb$

Process $gg\rightarrow h0\rightarrow H+ H- \rightarrow W+ A0 W- A0 \rightarrow l+ \nu_l l- \nu_l bbbb$

Signal (BP1, WARNING no cuts on b's, not even eta!), xsec before W decays 1227fb (already rescaled to best NLO with 1121/388!!!)

Background (three b-tags)

  • tt -> hopeless

Plot: delta R, pT 3rd and 4th jet

Signal (BP2, WARNING no cuts on b's, not even eta!), xsec before W decays 788fb (already rescaled to best NLO with 802/120!!!)

Background (three b-tags)

  • ttbb -> maybe, only 3pb before W decay (cuts on extra b's only, pt>15, eta<2.5, dR>0.2), LHE Events,Root events both Ws into l,vl (67k, xsec=143 fb)
  • ttjj, one mistag... At the end, hopeless

Plot: invariant mass

Process $gg\rightarrow tt \rightarrow W\pm H\mp bb \rightarrow W+ W- A0 bb \rightarrow W+ W- bbbb \rightarrow jj l\pm \nu_l bbbb$

Signal (BP1, pT cut at 15GeV and eta cut at 2.5 for b's), xsec total before w+ decay 1302 fb (no cuts on w decay products)

Process $pp\rightarrow tH\pm (b) \rightarrow W- b W+ A0 (b) \rightarrow W+ W- bbb(b) \rightarrow jj l\pm \nu_l bbb$

Signal (BP2, pT cut at 15GeV and eta cut at 2.5 for b's), xsec total before w+ decay 153 fb (no cuts on w decay products)

Signal (BP3, pT cut at 15GeV and eta cut at 2.5 for b's), xsec total before w+ decay 2504 fb (no cuts on w decay products)

Last modified 13 years ago Last modified on Apr 24, 2012, 11:27:46 AM

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