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## A study of jet mass distributions with grooming

(1) , (2) , (2)
1
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Simone Marzani
• Function : Author
Lais Schunk
• Function : Author
Gregory Soyez

#### Abstract

We perform a phenomenological study of the invariant mass distribution of hadronic jets produced in proton-proton collisions, in conjunction a grooming algorithm. In particular, we consider the modified MassDrop Tagger (mMDT), which corresponds to Soft Drop with angular exponent $\beta=0$. Our calculation, which is differential in both jet mass and jet transverse momentum, resums large logarithms of the jet mass, including the full dependence on the groomer's energy threshold $z_\text{cut}$, and it is matched to fixed-order QCD matrix elements at next-to-leading order. In order to account for non-perturbative contributions, originating from the hadronisation process and from the underlying event, we also include a phenomenological correction factor derived from Monte Carlo parton-shower simulations. Furthermore, we consider two different possibilities for the jet transverse momentum: before or after grooming. We show that the former should be preferred for comparisons with upcoming experimental data essentially because the mMDT transverse momentum spectrum is not collinear safe.

#### Domains

Physics [physics]

### Dates and versions

cea-01568370 , version 1 (25-07-2017)

### Identifiers

• HAL Id : cea-01568370 , version 1
• ARXIV :

### Cite

Simone Marzani, Lais Schunk, Gregory Soyez. A study of jet mass distributions with grooming. 2017. ⟨cea-01568370⟩

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