RECORD
RECO level \sqrt{s}_{min} and subsystem \sqrt{s}_{min}: improved global inclusive variables for measuring the new physics mass scale in missing energy events at hadron colliders
High Energy Physics - Phenomenology · Submitted 3 Jun 2010
abstract compiled · 2026-09-23 · no language-model review
The authors' main claim In this paper we advertize two improved variants of the \sqrt{s}_{min} variable, which overcome this problem.
The compiled record
The paper's own sentences, arranged. Each label is drawn from a closed vocabulary; the number beside it is the probability the classifier gave that label. Numbers in the tables are the authors', checked by code. No sentence in this record was written by a model.
Open the compiled record
The abstract, sentence by sentence
The variable \sqrt{s}_{min} was originally proposed in arXiv:0812.1042 as a model-independent, global and fully inclusive measure of the new physics mass scale in missing energy events at hadron colliders. In the original incarnation of \sqrt{s}_{min}, however, the connection to the new physics mass scale was blurred by the effects of the underlying event, most notably initial state radiation and multiple parton interactions. In this paper we advertize two improved variants of the \sqrt{s}_{min} variable, which overcome this problem. First we show that by evaluating the \sqrt{s}_{min} variable at the RECO level, in terms of the reconstructed objects in the event, the effects from the underlying event are significantly diminished and the nice correlation between the peak in the \sqrt{s}_{min}^{(reco)} distribution and the new physics mass scale is restored. Secondly, the underlying event problem can be avoided altogether when the \sqrt{s}_{min} concept is applied to a subsystem of the event which does not involve any QCD jets. We supply an analytic formula for the resulting subsystem \sqrt{s}_{min}^{(sub)} variable and show that its peak exhibits the usual correlation with the mass scale of the particles produced in the subsystem. Finally, we contrast \sqrt{s}_{min} to other popular inclusive variables such as H_T, M_{Tgen} and M_{TTgen}. We illustrate our discussion with several examples from supersymmetry, and with dilepton events from top quark pair production.
background contribution method result interpretation main claim
| # | sentence | role | the authors' own work | states the main conclusion | strength |
|---|---|---|---|---|---|
| s0 | The variable \sqrt{s}_{min} was originally proposed in arXiv:0812.1042 as a model-independent, global and fully inclusive measure of the new physics mass scale in missing energy events at hadron colliders. | background 1.00 | 0.04 | 0.04 | asserted 1.00 |
| s1 | In the original incarnation of \sqrt{s}_{min}, however, the connection to the new physics mass scale was blurred by the effects of the underlying event, most notably initial state radiation and multiple parton interactions. | background 0.65 | 0.10 | 0.03 | asserted 1.00 |
| s2 | In this paper we advertize two improved variants of the \sqrt{s}_{min} variable, which overcome this problem. | contribution 1.00 | 0.55 | 0.37 | asserted 0.97 |
| s3 | First we show that by evaluating the \sqrt{s}_{min} variable at the RECO level, in terms of the reconstructed objects in the event, the effects from the underlying event are significantly diminished and the nice correlation between the peak in the \sqrt{s}_{min}^{(reco)} distribution and the new physics mass scale is restored. | contribution 0.52 | 0.93 | 0.30 | asserted 1.00 |
| s4 | Secondly, the underlying event problem can be avoided altogether when the \sqrt{s}_{min} concept is applied to a subsystem of the event which does not involve any QCD jets. | contribution 0.72 | 0.77 | 0.16 | asserted 0.95 |
| s5 | We supply an analytic formula for the resulting subsystem \sqrt{s}_{min}^{(sub)} variable and show that its peak exhibits the usual correlation with the mass scale of the particles produced in the subsystem. | result 0.51 | 0.95 | 0.15 | asserted 1.00 |
| s6 | Finally, we contrast \sqrt{s}_{min} to other popular inclusive variables such as H_T, M_{Tgen} and M_{TTgen}. | contribution 0.80 | 0.82 | 0.04 | asserted 0.88 |
| s7 | We illustrate our discussion with several examples from supersymmetry, and with dilepton events from top quark pair production. | contribution 0.53 | 0.86 | 0.04 | asserted 0.92 |
What was examined, and what was not
- arXiv listing abstract v1
- full text
- figures and tables
- references and citing sentences
- relations to other papers
- P abstract
- S sections
- T body sentences
- C citations
- R cross-paper relations
The paper
Original abstract
The variable \sqrt{s}_{min} was originally proposed in arXiv:0812.1042 as a model-independent, global and fully inclusive measure of the new physics mass scale in missing energy events at hadron colliders. In the original incarnation of \sqrt{s}_{min}, however, the connection to the new physics mass scale was blurred by the effects of the underlying event, most notably initial state radiation and multiple parton interactions. In this paper we advertize two improved variants of the \sqrt{s}_{min} variable, which overcome this problem. First we show that by evaluating the \sqrt{s}_{min} variable at the RECO level, in terms of the reconstructed objects in the event, the effects from the underlying event are significantly diminished and the nice correlation between the peak in the \sqrt{s}_{min}^{(reco)} distribution and the new physics mass scale is restored. Secondly, the underlying event problem can be avoided altogether when the \sqrt{s}_{min} concept is applied to a subsystem of the event which does not involve any QCD jets. We supply an analytic formula for the resulting subsystem \sqrt{s}_{min}^{(sub)} variable and show that its peak exhibits the usual correlation with the mass scale of the particles produced in the subsystem. Finally, we contrast \sqrt{s}_{min} to other popular inclusive variables such as H_T, M_{Tgen} and M_{TTgen}. We illustrate our discussion with several examples from supersymmetry, and with dilepton events from top quark pair production.
Human review
References
How the literature uses it
37 arXiv papers cite this in 55 sentences
Papers citing it · 31 sentences without a confident label
Builds on it 1 paper
-
Therefore, in addition to the standard definition of $√(s_min)$ in Ref. [ref] , which is written in terms of the “visible” transverse momentum [equation] where $M_inv$ are hypothetical masses of invisible particles, we also employ a modified version in which the corresponding quantity is computed as if the charged leptons were invisible, hence part of the mET.
Fragmentation Uncertainties in Hadronic Observables for Top-quark Mass Measurements · Variants of the calibration observables · 0.93
Uses its method or tool 10 papers
-
For this purpose, we utilize the class of kinematic variables which were specifically designed for the dilepton $tt̅$ topology [ref] .
Probing the Triple Higgs Self-Interaction at the Large Hadron Collider · Introduction · 0.97
-
Along with Higgsness and Topness, we also consider two versions of the $ŝ_min$ variable [ref] , which is defined as
Portraying Double Higgs at the Large Hadron Collider · Kinematics in signal and backgrounds · 0.97
-
We find $P_T(J_0)$, $P_T(J_1)$, and $√(Ŝ_min)$ [ref] are highly correlated with $M_eff$ in both signal and background.
Top-philic Dark Matter in a Hybrid KSVZ axion framework · Analysis based on the Multivariate Gradient Boosting Technique · 0.85
Cites it as background 8 papers
-
Among all the inclusive and global mass determination variables $ŝ_min$ and its variants [ref] are quiet interesting as they provide the mass scale of new physics without worrying about the production mechanism.
Mass determination and event reconstruction at Large Hadron Collider · Introduction · 0.88
-
Several different methods have been proposed to identify an ISR jet [ref] .
Revisiting Combinatorial Ambiguities at Hadron Colliders with MT2 · Effect of ISR · 0.93
-
If this minimization is performed in the absence of any additional kinematic constraints besides ([ref]), one obtains the usual $√(s)_min$ variable [ref] .
Testing Invisible Momentum Ansatze in Missing Energy Events at the LHC · (3+1)-dimensional invariant mass target functions · 0.84
What it cites · 122 sentences without a confident label
Uses the method or tool of 1 paper
-
Events are generated with PYTHIA [ref] (using its default model of the underlying event) at an LHC of 14 TeV, and then reconstructed with the PGS detector simulation package [ref] .
PYTHIA 6.4 Physics and Manual · Event simulation details · 1.00
Uses data or values from 1 paper
-
For the $tt̅$ example presented in this section, we use the approximate next-to-next-to-leading order $tt̅$ cross-section of $σ_tt̅=894±4^+73+12_-46-12$ pb at a top mass of $m_t=175$ GeV [ref] .
The theoretical top quark cross section at the Tevatron and the LHC · Event simulation details · 1.00
Compares with 1 paper
-
At the same time, compared to the original calorimeter-based $√(s)_min$ variable considered in Ref. [ref] , the new variables $√(s)_min^ (reco)$ and $√(s)_min^ (sub)$ proposed here have one crucial advantage: they have very little sensitivity to the effects from the underlying event (ISR and MPI).
\sqrt{s}_min: a global inclusive variable for determining the mass scale of new physics in events with missing energy at hadron colliders · Summary and conclusions · 0.90
Cites as background 5 papers
-
On the other hand, the transverse momentum of the initial state is known, which has greatly motivated the use of transverse variables like the missing “transverse energy” $$, the scalar sum of transverse momenta $H_T$, the transverse mass $M_T$, the stransverse mass $M_T2$ [ref] , the contransverse mass $M_CT$ [ref] , etc.
On measuring the masses of pair-produced semi-invisibly decaying particles at hadron colliders · The need for a universal, global and inclusive mass variable · 0.95
-
On the other hand, the transverse momentum of the initial state is known, which has greatly motivated the use of transverse variables like the missing “transverse energy” $$, the scalar sum of transverse momenta $H_T$, the transverse mass $M_T$, the stransverse mass $M_T2$ [ref] , the contransverse mass $M_CT$ [ref] , etc.
Measuring masses of semi-invisibly decaying particles pair produced at hadron colliders · The need for a universal, global and inclusive mass variable · 0.95
-
Each SUSY event contains two independent cascade decay chains, so first one must decide which reconstructed objects belong to the first decay chain and which belong to the second [ref] .
MTGEN : Mass scale measurements in pair-production at colliders · The need for a universal, global and inclusive mass variable · 0.83
Discussion
Know something about this paper? Leave a comment, or highlight any passage above to comment on it.