# On HQET and NRQCD operators of dimension 8 and above

## Abstract

Effective field theories such as Heavy Quark Effective Theory (HQET) and Non Relativistic Quantum Chromo-(Electro-) dynamics NRQCD (NRQED) are indispensable tools in controlling the effects of the strong interaction. The increasing experimental precision requires the knowledge of higher dimensional operators. We present a general method that allows for an easy construction of HQET or NRQCD (NRQED) operators that contain two heavy quark or non-relativistic fields and any number of covariant derivatives. As an application of our method, we list these terms in the 1/M ^{4} NRQCD Lagrangian, where M is the mass of of the spin-half field.

- Authors:

- Wayne State Univ., Detroit, MI (United States)

- Publication Date:

- Research Org.:
- Wayne State Univ., Detroit, MI (United States)

- Sponsoring Org.:
- USDOE

- OSTI Identifier:
- 1425918

- Grant/Contract Number:
- SC0007983

- Resource Type:
- Journal Article: Accepted Manuscript

- Journal Name:
- Journal of High Energy Physics (Online)

- Additional Journal Information:
- Journal Volume: 2017; Journal Issue: 7; Journal ID: ISSN 1029-8479

- Publisher:
- Springer Berlin

- Country of Publication:
- United States

- Language:
- English

- Subject:
- 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS

### Citation Formats

```
Gunawardana, Ayesh, and Paz, Gil.
```*On HQET and NRQCD operators of dimension 8 and above*. United States: N. p., 2017.
Web. doi:10.1007/JHEP07(2017)137.

```
Gunawardana, Ayesh, & Paz, Gil.
```*On HQET and NRQCD operators of dimension 8 and above*. United States. doi:10.1007/JHEP07(2017)137.

```
Gunawardana, Ayesh, and Paz, Gil. Thu .
"On HQET and NRQCD operators of dimension 8 and above". United States. doi:10.1007/JHEP07(2017)137. https://www.osti.gov/servlets/purl/1425918.
```

```
@article{osti_1425918,
```

title = {On HQET and NRQCD operators of dimension 8 and above},

author = {Gunawardana, Ayesh and Paz, Gil},

abstractNote = {Effective field theories such as Heavy Quark Effective Theory (HQET) and Non Relativistic Quantum Chromo-(Electro-) dynamics NRQCD (NRQED) are indispensable tools in controlling the effects of the strong interaction. The increasing experimental precision requires the knowledge of higher dimensional operators. We present a general method that allows for an easy construction of HQET or NRQCD (NRQED) operators that contain two heavy quark or non-relativistic fields and any number of covariant derivatives. As an application of our method, we list these terms in the 1/M4 NRQCD Lagrangian, where M is the mass of of the spin-half field.},

doi = {10.1007/JHEP07(2017)137},

journal = {Journal of High Energy Physics (Online)},

issn = {1029-8479},

number = 7,

volume = 2017,

place = {United States},

year = {2017},

month = {7}

}

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Cited by: 2 works

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