# Gg initial states (Higgs, with NLM Higgs)

### From Wiki Les Houches 09

(→Parameters/plots of the study number 1: Inclusive Higgs) |
Current revision (15:17, 27 January 2010) (view source) (→Parameters/plots of the study number 2: Higgs + dijet) |
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== Parameters/plots of the study number 1: Inclusive Higgs == | == Parameters/plots of the study number 1: Inclusive Higgs == | ||

- | + | ||

* CTEQ6M for NLO and NNLO results | * CTEQ6M for NLO and NNLO results | ||

* CTEQ6L1 for LO results | * CTEQ6L1 for LO results | ||

+ | * 5 Flavours in the initial state | ||

* pp @ LHC10, mh=120 | * pp @ LHC10, mh=120 | ||

* jet-algorithm : kt with D=0.7, E-scheme (fastjet implementation from [http://www.lpthe.jussieu.fr/~salam/fastjet/ here]) | * jet-algorithm : kt with D=0.7, E-scheme (fastjet implementation from [http://www.lpthe.jussieu.fr/~salam/fastjet/ here]) | ||

* Matched samples plots to be done after showering/before hadronization | * Matched samples plots to be done after showering/before hadronization | ||

+ | * For the Higgs-effective coupling let's use the notation of [[http://cp3wks05.fynu.ucl.ac.be/twiki/bin/view/Software/HiggsEffective]] with tau=0, with a fixed value of alpha_S=0.120. NB: this is not compulsory as in some codes it is difficult to set this. Please quote what value you use in your datafile. | ||

+ | |||

Plots: | Plots: | ||

- | + | Jets are restricted to p_T>20, |eta|<4.5 | |

- | 2. Pt (pt) and and | + | 0. Format : x y dy (dy is just a placeholder for some kind of uncertainty.zero content bins should be dropped). |

+ | |||

+ | 1. Jet rates (from zero jets to 5 jets) | ||

+ | |||

+ | 2. Pt (pt) and and rapidity (y) of the Higgs: | ||

pt in [0:250] GeV bins of 10 GeV | pt in [0:250] GeV bins of 10 GeV | ||

pt in [0:50] GeV bins of 2 GeV | pt in [0:50] GeV bins of 2 GeV | ||

- | + | y in [-5.25 : 5.25] bins of 0.5 | |

3. pt jets and eta of jets and deltaR(i,j): | 3. pt jets and eta of jets and deltaR(i,j): | ||

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== Parameters/plots of the study number 2: Higgs + dijet == | == Parameters/plots of the study number 2: Higgs + dijet == | ||

- | Jeppe and | + | Jeppe, Stefan and John to fill this. |

- | + | ||

- | + | ||

- | |||

PDF: MSTW2008NLO | PDF: MSTW2008NLO | ||

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Higgs: |y_h|<4.5 | Higgs: |y_h|<4.5 | ||

- | 1. Average number of hard jets vs. rapidity span | + | 1. Average number of hard jets and tagjet azimuthal decorrelation vs. rapidity span |

- | + | (Delta y_{ja jb} is rapidity difference between the most forward/backward hard jet) | |

+ | <N_jet> vs Delta y_{ja jb} [0:8] in bins of 0.25 units of rapidity | ||

+ | <cos(Pi-DeltaPhi)> vs Delta y_{ja jb} [0:8] in bins of 0.25 | ||

- | + | 2. Distribution of rapidity difference between most forward/backward hard jet (and of hardest (in pt) and next-to-hardest jet). bin width of .25 units of rapidity, range 0-9. | |

- | + | ||

- | + | The remaining studies require also | |

+ | Delta y_{ja jb}>4., where jb is the backward and ja is the forward hard jet | ||

3. Transverse momentum distribution for the Higgs boson | 3. Transverse momentum distribution for the Higgs boson | ||

+ | pt in [0:250] GeV bins of 10 GeV | ||

- | 4. Effects of central rapidity jet veto (a la Fig. 23 in arXiv:0808.3696) | + | 4. Effects of central rapidity jet veto (a la Fig. 23 in arXiv:0808.3696, same binning i.e. [0:4] in 0.1 in y_c) |

## Current revision

# gg> H + jets study

People so far :

- P. Skands,
- F. Maltoni,
- M. Mangano, Alpgen matched with PS
- S. de Visscher, MG/ME matched with PS
- J. Andersen, HE approach
- C. Oleari, MC@NLO+POWHEG+HNNLO
- J. Winter, S. Hoeche, SHERPA
- K. Hamilton, HERWIG++ (+POWHEG)

## Parameters/plots of the study number 1: Inclusive Higgs

- CTEQ6M for NLO and NNLO results
- CTEQ6L1 for LO results
- 5 Flavours in the initial state
- pp @ LHC10, mh=120
- jet-algorithm : kt with D=0.7, E-scheme (fastjet implementation from here)
- Matched samples plots to be done after showering/before hadronization
- For the Higgs-effective coupling let's use the notation of [[1]] with tau=0, with a fixed value of alpha_S=0.120. NB: this is not compulsory as in some codes it is difficult to set this. Please quote what value you use in your datafile.

Plots:

Jets are restricted to p_T>20, |eta|<4.5

0. Format : x y dy (dy is just a placeholder for some kind of uncertainty.zero content bins should be dropped).

1. Jet rates (from zero jets to 5 jets)

2. Pt (pt) and and rapidity (y) of the Higgs:

pt in [0:250] GeV bins of 10 GeV pt in [0:50] GeV bins of 2 GeV y in [-5.25 : 5.25] bins of 0.5

3. pt jets and eta of jets and deltaR(i,j):

1st j pt [0:250] GeV bins of 10 GeV 2nd j pt [0:150] GeV bins of 10 GeV 3rd j pt [0:100] GeV bins of 10 GeV 4rd j pt [0:100] GeV bins of 10 GeV nth j eta [-5.25:5.25] in bins of 0.5 Delta12,23,34 in [0,5] in bins of 0.2

1. Ht_red and Ht

a. Sum of pt_jets (no higgs) in [0:500] bins of 10 GeV b. Sum of pt_jets + pt higgs in [0:500] bins of 10 GeV

## Parameters/plots of the study number 2: Higgs + dijet

Jeppe, Stefan and John to fill this.

PDF: MSTW2008NLO Jet-algo: kt with D=0.7, min jet pt:40GeV, |y_j|<4.5 Require at least two jets Higgs: |y_h|<4.5

1. Average number of hard jets and tagjet azimuthal decorrelation vs. rapidity span (Delta y_{ja jb} is rapidity difference between the most forward/backward hard jet)

<N_jet> vs Delta y_{ja jb} [0:8] in bins of 0.25 units of rapidity <cos(Pi-DeltaPhi)> vs Delta y_{ja jb} [0:8] in bins of 0.25

2. Distribution of rapidity difference between most forward/backward hard jet (and of hardest (in pt) and next-to-hardest jet). bin width of .25 units of rapidity, range 0-9.

The remaining studies require also

Delta y_{ja jb}>4., where jb is the backward and ja is the forward hard jet

3. Transverse momentum distribution for the Higgs boson

pt in [0:250] GeV bins of 10 GeV

4. Effects of central rapidity jet veto (a la Fig. 23 in arXiv:0808.3696, same binning i.e. [0:4] in 0.1 in y_c)