Calc QCD Form Factors: Numerical Integration

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Discussion Overview

The discussion revolves around the calculation of form factors related to hadronic decays, specifically focusing on semileptonic B decays. Participants explore the complexities involved in numerical integration for these calculations and inquire about available computational packages and methodologies.

Discussion Character

  • Exploratory, Technical explanation, Debate/contested

Main Points Raised

  • One participant seeks information on packages for calculating form factors, indicating the complexity of the numerical integration involved.
  • Another participant asks for clarification on which specific form factors are being referenced, suggesting that some are well-known while others may be more challenging to compute.
  • A participant mentions their focus on semileptonic B decays and references specific measurements and model calculations related to B to D* form factors.
  • Further contributions include references to older papers and lattice calculations that discuss exclusive semileptonic B decays and their form factors.
  • One participant suggests that holographic methods are gaining attention for calculating electromagnetic baryon form factors, indicating a potential avenue for new calculations.

Areas of Agreement / Disagreement

Participants express varying levels of familiarity with the specific form factors and methodologies, indicating that multiple competing views and approaches exist without a clear consensus on the best methods or available resources.

Contextual Notes

Some discussions reference older papers and model calculations, which may not reflect the latest developments or methodologies in the field. The complexity of the numerical integration and the specific requirements for different form factors remain unresolved.

Who May Find This Useful

Researchers and practitioners working on hadronic decays, particularly those focused on semileptonic B decays and numerical methods in particle physics.

plasmon
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Dear friends, i was working on a hadronic decays. It appears that one has to calculate form factors. These form factors involve some very complex numerical integration. I would like to know if there are some packages available for calculating these form factors.
 
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Hi,

which form factors more specifically ? If you need all possible of them, it's going to be difficult :smile: Some of them are fairly (or very) well known.
 
I was working on semileptonic B decays.
 
plasmon said:
I was working on semileptonic B decays.
There are some data on that, such as :
Measurements of the B to D* Form Factors Using the Decay B0 --> D* e nu_e

There are model calculations such as
Form Factors for Exclusive Semileptonic $B$--Decays
but this may be old. A paper giving references to B-FFs :
A Study of Exclusive Charmless Semileptonic B Decays and Extraction of |V_{ub}| at CLEO
Another, older :
Measurement of Exclusive $B \to X_u \ell \nu$ Decays with $D^{(*)} \ell \nu$ Decay Tagging
They also both point to lattice calculations.

If your goal is to make a new calculation, holographic is fancy lately :smile:
Electromagnetic Baryon Form Factors from Holographic QCD
(posted today)
 

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